lisp/ob-core.el

   1 ;;; ob-core.el --- working with code blocks in org-mode
   2
   3 ;; Copyright (C) 2009-2013  Free Software Foundation, Inc.
   4
   5 ;; Authors: Eric Schulte
   6 ;;      Dan Davison
   7 ;; Keywords: literate programming, reproducible research
   8 ;; Homepage: http://orgmode.org
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Code:
  26 (eval-when-compile
  27   (require 'cl))
  28 (require 'ob-eval)
  29 (require 'org-macs)
  30 (require 'org-compat)
  31
  32 (defconst org-babel-exeext
  33   (if (memq system-type '(windows-nt cygwin))
  34       ".exe"
  35     nil))
  36 ;; dynamically scoped for tramp
  37 (defvar org-babel-call-process-region-original nil)
  38 (defvar org-src-lang-modes)
  39 (defvar org-babel-library-of-babel)
  40 (declare-function show-all "outline" ())
  41 (declare-function org-reduce "org" (CL-FUNC CL-SEQ &rest CL-KEYS))
  42 (declare-function org-mark-ring-push "org" (&optional pos buffer))
  43 (declare-function tramp-compat-make-temp-file "tramp-compat"
  44                   (filename &optional dir-flag))
  45 (declare-function tramp-dissect-file-name "tramp" (name &optional nodefault))
  46 (declare-function tramp-file-name-user "tramp" (vec))
  47 (declare-function tramp-file-name-host "tramp" (vec))
  48 (declare-function with-parsed-tramp-file-name "tramp" (filename var &rest body))
  49 (declare-function org-icompleting-read "org" (&rest args))
  50 (declare-function org-edit-src-code "org-src"
  51                   (&optional context code edit-buffer-name quietp))
  52 (declare-function org-edit-src-exit "org-src"  (&optional context))
  53 (declare-function org-open-at-point "org" (&optional in-emacs reference-buffer))
  54 (declare-function org-save-outline-visibility "org-macs" (use-markers &rest body))
  55 (declare-function org-outline-overlay-data "org" (&optional use-markers))
  56 (declare-function org-set-outline-overlay-data "org" (data))
  57 (declare-function org-narrow-to-subtree "org" ())
  58 (declare-function org-split-string "org" (string &optional separators))
  59 (declare-function org-entry-get "org"
  60                   (pom property &optional inherit literal-nil))
  61 (declare-function org-make-options-regexp "org" (kwds &optional extra))
  62 (declare-function org-do-remove-indentation "org" (&optional n))
  63 (declare-function org-next-block "org" (arg &optional backward block-regexp))
  64 (declare-function org-previous-block "org" (arg &optional block-regexp))
  65 (declare-function org-show-context "org" (&optional key))
  66 (declare-function org-at-table-p "org" (&optional table-type))
  67 (declare-function org-cycle "org" (&optional arg))
  68 (declare-function org-uniquify "org" (list))
  69 (declare-function org-current-level "org" ())
  70 (declare-function org-table-import "org-table" (file arg))
  71 (declare-function org-add-hook "org-compat"
  72                   (hook function &optional append local))
  73 (declare-function org-table-align "org-table" ())
  74 (declare-function org-table-end "org-table" (&optional table-type))
  75 (declare-function orgtbl-to-generic "org-table" (table params))
  76 (declare-function orgtbl-to-orgtbl "org-table" (table params))
  77 (declare-function org-babel-tangle-comment-links "ob-tangle" (&optional info))
  78 (declare-function org-babel-lob-get-info "ob-lob" nil)
  79 (declare-function org-babel-ref-split-args "ob-ref" (arg-string))
  80 (declare-function org-babel-ref-parse "ob-ref" (assignment))
  81 (declare-function org-babel-ref-resolve "ob-ref" (ref))
  82 (declare-function org-babel-ref-goto-headline-id "ob-ref" (id))
  83 (declare-function org-babel-ref-headline-body "ob-ref" ())
  84 (declare-function org-babel-lob-execute-maybe "ob-lob" ())
  85 (declare-function org-number-sequence "org-compat" (from &optional to inc))
  86 (declare-function org-at-item-p "org-list" ())
  87 (declare-function org-list-parse-list "org-list" (&optional delete))
  88 (declare-function org-list-to-generic "org-list" (LIST PARAMS))
  89 (declare-function org-list-struct "org-list" ())
  90 (declare-function org-list-prevs-alist "org-list" (struct))
  91 (declare-function org-list-get-list-end "org-list" (item struct prevs))
  92 (declare-function org-remove-if "org" (predicate seq))
  93 (declare-function org-completing-read "org" (&rest args))
  94 (declare-function org-escape-code-in-region "org-src" (beg end))
  95 (declare-function org-unescape-code-in-string "org-src" (s))
  96 (declare-function org-table-to-lisp "org-table" (&optional txt))
  97 (declare-function org-reverse-string "org" (string))
  98
  99 (defgroup org-babel nil
 100   "Code block evaluation and management in `org-mode' documents."
 101   :tag "Babel"
 102   :group 'org)
 103
 104 (defcustom org-confirm-babel-evaluate t
 105   "Confirm before evaluation.
 106 Require confirmation before interactively evaluating code
 107 blocks in Org-mode buffers.  The default value of this variable
 108 is t, meaning confirmation is required for any code block
 109 evaluation.  This variable can be set to nil to inhibit any
 110 future confirmation requests.  This variable can also be set to a
 111 function which takes two arguments the language of the code block
 112 and the body of the code block.  Such a function should then
 113 return a non-nil value if the user should be prompted for
 114 execution or nil if no prompt is required.
 115
 116 Warning: Disabling confirmation may result in accidental
 117 evaluation of potentially harmful code.  It may be advisable
 118 remove code block execution from C-c C-c as further protection
 119 against accidental code block evaluation.  The
 120 `org-babel-no-eval-on-ctrl-c-ctrl-c' variable can be used to
 121 remove code block execution from the C-c C-c keybinding."
 122   :group 'org-babel
 123   :version "24.1"
 124   :type '(choice boolean function))
 125 ;; don't allow this variable to be changed through file settings
 126 (put 'org-confirm-babel-evaluate 'safe-local-variable (lambda (x) (eq x t)))
 127
 128 (defcustom org-babel-no-eval-on-ctrl-c-ctrl-c nil
 129   "Remove code block evaluation from the C-c C-c key binding."
 130   :group 'org-babel
 131   :version "24.1"
 132   :type 'boolean)
 133
 134 (defcustom org-babel-results-keyword "RESULTS"
 135   "Keyword used to name results generated by code blocks.
 136 Should be either RESULTS or NAME however any capitalization may
 137 be used."
 138   :group 'org-babel
 139   :version "24.4"
 140   :package-version '(Org . "8.0")
 141   :type 'string)
 142
 143 (defcustom org-babel-noweb-wrap-start "<<"
 144   "String used to begin a noweb reference in a code block.
 145 See also `org-babel-noweb-wrap-end'."
 146   :group 'org-babel
 147   :type 'string)
 148
 149 (defcustom org-babel-noweb-wrap-end ">>"
 150   "String used to end a noweb reference in a code block.
 151 See also `org-babel-noweb-wrap-start'."
 152   :group 'org-babel
 153   :type 'string)
 154
 155 (defcustom org-babel-inline-result-wrap "=%s="
 156   "Format string used to wrap inline results.
 157 This string must include a \"%s\" which will be replaced by the results."
 158   :group 'org-babel
 159   :type 'string)
 160
 161 (defun org-babel-noweb-wrap (&optional regexp)
 162   (concat org-babel-noweb-wrap-start
 163           (or regexp "\\([^ \t\n].+?[^ \t]\\|[^ \t\n]\\)")
 164           org-babel-noweb-wrap-end))
 165
 166 (defvar org-babel-src-name-regexp
 167   "^[ \t]*#\\+name:[ \t]*"
 168   "Regular expression used to match a source name line.")
 169
 170 (defvar org-babel-multi-line-header-regexp
 171   "^[ \t]*#\\+headers?:[ \t]*\\([^\n]*\\)$"
 172   "Regular expression used to match multi-line header arguments.")
 173
 174 (defvar org-babel-src-name-w-name-regexp
 175   (concat org-babel-src-name-regexp
 176           "\\("
 177           org-babel-multi-line-header-regexp
 178           "\\)*"
 179           "\\([^ ()\f\t\n\r\v]+\\)")
 180   "Regular expression matching source name lines with a name.")
 181
 182 (defvar org-babel-src-block-regexp
 183   (concat
 184    ;; (1) indentation                 (2) lang
 185    "^\\([ \t]*\\)#\\+begin_src[ \t]+\\([^ \f\t\n\r\v]+\\)[ \t]*"
 186    ;; (3) switches
 187    "\\([^\":\n]*\"[^\"\n*]*\"[^\":\n]*\\|[^\":\n]*\\)"
 188    ;; (4) header arguments
 189    "\\([^\n]*\\)\n"
 190    ;; (5) body
 191    "\\([^\000]*?\n\\)?[ \t]*#\\+end_src")
 192   "Regexp used to identify code blocks.")
 193
 194 (defvar org-babel-inline-src-block-regexp
 195   (concat
 196    ;; (1) replacement target (2) lang
 197    "\\(?:^\\|[^-[:alnum:]]\\)\\(src_\\([^ \f\t\n\r\v]+\\)"
 198    ;; (3,4) (unused, headers)
 199    "\\(\\|\\[\\(.*?\\)\\]\\)"
 200    ;; (5) body
 201    "{\\([^\f\n\r\v]+?\\)}\\)")
 202   "Regexp used to identify inline src-blocks.")
 203
 204 (defun org-babel-get-header (params key &optional others)
 205   "Select only header argument of type KEY from a list.
 206 Optional argument OTHERS indicates that only the header that do
 207 not match KEY should be returned."
 208   (delq nil
 209         (mapcar
 210          (lambda (p) (when (funcall (if others #'not #'identity) (eq (car p) key)) p))
 211          params)))
 212
 213 (defun org-babel-get-inline-src-block-matches()
 214   "Set match data if within body of an inline source block.
 215 Returns non-nil if match-data set"
 216   (let ((src-at-0-p (save-excursion
 217                       (beginning-of-line 1)
 218                       (string= "src" (thing-at-point 'word))))
 219         (first-line-p (= 1 (line-number-at-pos)))
 220         (orig (point)))
 221     (let ((search-for (cond ((and src-at-0-p first-line-p  "src_"))
 222                             (first-line-p "[[:punct:] \t]src_")
 223                             (t "[[:punct:] \f\t\n\r\v]src_")))
 224           (lower-limit (if first-line-p
 225                            nil
 226                          (- (point-at-bol) 1))))
 227       (save-excursion
 228         (when (or (and src-at-0-p (bobp))
 229                   (and (re-search-forward "}" (point-at-eol) t)
 230                        (re-search-backward search-for lower-limit t)
 231                        (> orig (point))))
 232           (when (looking-at org-babel-inline-src-block-regexp)
 233             t ))))))
 234
 235 (defvar org-babel-inline-lob-one-liner-regexp)
 236 (defun org-babel-get-lob-one-liner-matches()
 237   "Set match data if on line of an lob one liner.
 238 Returns non-nil if match-data set"
 239   (save-excursion
 240     (unless (= (point) (point-at-bol)) ;; move before inline block
 241       (re-search-backward "[ \f\t\n\r\v]" nil t))
 242     (if (looking-at org-babel-inline-lob-one-liner-regexp)
 243         t
 244       nil)))
 245
 246 (defun org-babel-get-src-block-info (&optional light)
 247   "Get information on the current source block.
 248
 249 Optional argument LIGHT does not resolve remote variable
 250 references; a process which could likely result in the execution
 251 of other code blocks.
 252
 253 Returns a list
 254  (language body header-arguments-alist switches name indent block-head)."
 255   (let ((case-fold-search t) head info name indent)
 256     ;; full code block
 257     (if (setq head (org-babel-where-is-src-block-head))
 258         (save-excursion
 259           (goto-char head)
 260           (setq info (org-babel-parse-src-block-match))
 261           (setq indent (nth 5 info))
 262           (setq info (butlast info))
 263           (while (and (forward-line -1)
 264                       (looking-at org-babel-multi-line-header-regexp))
 265             (setf (nth 2 info)
 266                   (org-babel-merge-params
 267                    (nth 2 info)
 268                    (org-babel-parse-header-arguments (match-string 1)))))
 269           (when (looking-at org-babel-src-name-w-name-regexp)
 270             (setq name (org-no-properties (match-string 3)))))
 271       ;; inline source block
 272       (when (org-babel-get-inline-src-block-matches)
 273         (setq info (org-babel-parse-inline-src-block-match))))
 274     ;; resolve variable references and add summary parameters
 275     (when (and info (not light))
 276       (setf (nth 2 info) (org-babel-process-params (nth 2 info))))
 277     (when info (append info (list name indent head)))))
 278
 279 (defvar org-current-export-file) ; dynamically bound
 280 (defmacro org-babel-check-confirm-evaluate (info &rest body)
 281   "Evaluate BODY with special execution confirmation variables set.
 282
 283 Specifically; NOEVAL will indicate if evaluation is allowed,
 284 QUERY will indicate if a user query is required, CODE-BLOCK will
 285 hold the language of the code block, and BLOCK-NAME will hold the
 286 name of the code block."
 287   (declare (indent defun))
 288   (org-with-gensyms
 289       (lang block-body headers name eval eval-no export eval-no-export)
 290     `(let* ((,lang           (nth 0 ,info))
 291             (,block-body     (nth 1 ,info))
 292             (,headers        (nth 2 ,info))
 293             (,name           (nth 4 ,info))
 294             (,eval           (or (cdr  (assoc :eval   ,headers))
 295                                  (when (assoc :noeval ,headers) "no")))
 296             (,eval-no        (or (equal ,eval "no")
 297                                  (equal ,eval "never")))
 298             (,export         (org-bound-and-true-p org-current-export-file))
 299             (,eval-no-export (and ,export (or (equal ,eval "no-export")
 300                                               (equal ,eval "never-export"))))
 301             (noeval          (or ,eval-no ,eval-no-export))
 302             (query           (or (equal ,eval "query")
 303                                  (and ,export (equal ,eval "query-export"))
 304                                  (if (functionp org-confirm-babel-evaluate)
 305                                      (funcall org-confirm-babel-evaluate
 306                                               ,lang ,block-body)
 307                                    org-confirm-babel-evaluate)))
 308             (code-block      (if ,info (format  " %s "  ,lang) " "))
 309             (block-name      (if ,name (format " (%s) " ,name) " ")))
 310        ,@body)))
 311
 312 (defsubst org-babel-check-evaluate (info)
 313   "Check if code block INFO should be evaluated.
 314 Do not query the user."
 315   (org-babel-check-confirm-evaluate info
 316     (not (when noeval
 317            (message (format "Evaluation of this%scode-block%sis disabled."
 318                             code-block block-name))))))
 319
 320  ;; dynamically scoped for asynchroneous export
 321 (defvar org-babel-confirm-evaluate-answer-no)
 322
 323 (defsubst org-babel-confirm-evaluate (info)
 324   "Confirm evaluation of the code block INFO.
 325
 326 If the variable `org-babel-confirm-evaluate-answer-no' is bound
 327 to a non-nil value, auto-answer with \"no\".
 328
 329 This query can also be suppressed by setting the value of
 330 `org-confirm-babel-evaluate' to nil, in which case all future
 331 interactive code block evaluations will proceed without any
 332 confirmation from the user.
 333
 334 Note disabling confirmation may result in accidental evaluation
 335 of potentially harmful code."
 336   (org-babel-check-confirm-evaluate info
 337     (not (when query
 338            (unless
 339                (and (not (org-bound-and-true-p
 340                           org-babel-confirm-evaluate-answer-no))
 341                     (yes-or-no-p
 342                      (format "Evaluate this%scode block%son your system? "
 343                              code-block block-name)))
 344              (message (format "Evaluation of this%scode-block%sis aborted."
 345                               code-block block-name)))))))
 346
 347 ;;;###autoload
 348 (defun org-babel-execute-safely-maybe ()
 349   (unless org-babel-no-eval-on-ctrl-c-ctrl-c
 350     (org-babel-execute-maybe)))
 351
 352 (add-hook 'org-ctrl-c-ctrl-c-hook 'org-babel-execute-safely-maybe)
 353
 354 ;;;###autoload
 355 (defun org-babel-execute-maybe ()
 356   (interactive)
 357   (or (org-babel-execute-src-block-maybe)
 358       (org-babel-lob-execute-maybe)))
 359
 360 (defmacro org-babel-when-in-src-block (&rest body)
 361   "Execute BODY if point is in a source block and return t.
 362
 363 Otherwise do nothing and return nil."
 364   `(if (or (org-babel-where-is-src-block-head)
 365            (org-babel-get-inline-src-block-matches))
 366        (progn
 367          ,@body
 368          t)
 369      nil))
 370
 371 (defun org-babel-execute-src-block-maybe ()
 372   "Conditionally execute a source block.
 373 Detect if this is context for a Babel src-block and if so
 374 then run `org-babel-execute-src-block'."
 375   (interactive)
 376   (org-babel-when-in-src-block
 377    (org-babel-eval-wipe-error-buffer)
 378    (org-babel-execute-src-block current-prefix-arg)))
 379
 380 ;;;###autoload
 381 (defun org-babel-view-src-block-info ()
 382   "Display information on the current source block.
 383 This includes header arguments, language and name, and is largely
 384 a window into the `org-babel-get-src-block-info' function."
 385   (interactive)
 386   (let ((info (org-babel-get-src-block-info 'light))
 387         (full (lambda (it) (> (length it) 0)))
 388         (printf (lambda (fmt &rest args) (princ (apply #'format fmt args)))))
 389     (when info
 390       (with-help-window (help-buffer)
 391         (let ((name        (nth 4 info))
 392               (lang        (nth 0 info))
 393               (switches    (nth 3 info))
 394               (header-args (nth 2 info)))
 395           (when name            (funcall printf "Name: %s\n"     name))
 396           (when lang            (funcall printf "Lang: %s\n"     lang))
 397           (when (funcall full switches) (funcall printf "Switches: %s\n" switches))
 398           (funcall printf "Header Arguments:\n")
 399           (dolist (pair (sort header-args
 400                               (lambda (a b) (string< (symbol-name (car a))
 401                                                      (symbol-name (car b))))))
 402             (when (funcall full (cdr pair))
 403               (funcall printf "\t%S%s\t%s\n"
 404                        (car pair)
 405                        (if (> (length (format "%S" (car pair))) 7) "" "\t")
 406                        (cdr pair)))))))))
 407
 408 ;;;###autoload
 409 (defun org-babel-expand-src-block-maybe ()
 410   "Conditionally expand a source block.
 411 Detect if this is context for a org-babel src-block and if so
 412 then run `org-babel-expand-src-block'."
 413   (interactive)
 414   (org-babel-when-in-src-block
 415    (org-babel-expand-src-block current-prefix-arg)))
 416
 417 ;;;###autoload
 418 (defun org-babel-load-in-session-maybe ()
 419   "Conditionally load a source block in a session.
 420 Detect if this is context for a org-babel src-block and if so
 421 then run `org-babel-load-in-session'."
 422   (interactive)
 423   (org-babel-when-in-src-block
 424    (org-babel-load-in-session current-prefix-arg)))
 425
 426 (add-hook 'org-metaup-hook 'org-babel-load-in-session-maybe)
 427
 428 ;;;###autoload
 429 (defun org-babel-pop-to-session-maybe ()
 430   "Conditionally pop to a session.
 431 Detect if this is context for a org-babel src-block and if so
 432 then run `org-babel-switch-to-session'."
 433   (interactive)
 434   (org-babel-when-in-src-block
 435    (org-babel-switch-to-session current-prefix-arg)))
 436
 437 (add-hook 'org-metadown-hook 'org-babel-pop-to-session-maybe)
 438
 439 (defconst org-babel-common-header-args-w-values
 440   '((cache      . ((no yes)))
 441     (cmdline    . :any)
 442     (colnames   . ((nil no yes)))
 443     (comments   . ((no link yes org both noweb)))
 444     (dir        . :any)
 445     (eval       . ((never query)))
 446     (exports    . ((code results both none)))
 447     (epilogue   . :any)
 448     (file       . :any)
 449     (file-desc  . :any)
 450     (hlines     . ((no yes)))
 451     (mkdirp     . ((yes no)))
 452     (no-expand)
 453     (noeval)
 454     (noweb      . ((yes no tangle no-export strip-export)))
 455     (noweb-ref  . :any)
 456     (noweb-sep  . :any)
 457     (padline    . ((yes no)))
 458     (post       . :any)
 459     (prologue   . :any)
 460     (results    . ((file list vector table scalar verbatim)
 461                    (raw html latex org code pp drawer)
 462                    (replace silent none append prepend)
 463                    (output value)))
 464     (rownames   . ((no yes)))
 465     (sep        . :any)
 466     (session    . :any)
 467     (shebang    . :any)
 468     (tangle     . ((tangle yes no :any)))
 469     (tangle-mode . ((#o755 #o555 #o444 :any)))
 470     (var        . :any)
 471     (wrap       . :any)))
 472
 473 (defconst org-babel-header-arg-names
 474   (mapcar #'car org-babel-common-header-args-w-values)
 475   "Common header arguments used by org-babel.
 476 Note that individual languages may define their own language
 477 specific header arguments as well.")
 478
 479 (defvar org-babel-default-header-args
 480   '((:session . "none") (:results . "replace") (:exports . "code")
 481     (:cache . "no") (:noweb . "no") (:hlines . "no") (:tangle . "no")
 482     (:padnewline . "yes"))
 483   "Default arguments to use when evaluating a source block.")
 484
 485 (defvar org-babel-default-inline-header-args
 486   '((:session . "none") (:results . "replace") (:exports . "results"))
 487   "Default arguments to use when evaluating an inline source block.")
 488
 489 (defvar org-babel-data-names '("tblname" "results" "name"))
 490
 491 (defvar org-babel-result-regexp
 492   (concat "^[ \t]*#\\+"
 493           (regexp-opt org-babel-data-names t)
 494           "\\(\\[\\("
 495           ;; FIXME The string below is `org-ts-regexp'
 496           "<\\([0-9]\\{4\\}-[0-9]\\{2\\}-[0-9]\\{2\\} ?[^\r\n>]*?\\)>"
 497           " \\)?\\([[:alnum:]]+\\)\\]\\)?\\:[ \t]*")
 498   "Regular expression used to match result lines.
 499 If the results are associated with a hash key then the hash will
 500 be saved in the second match data.")
 501
 502 (defvar org-babel-result-w-name-regexp
 503   (concat org-babel-result-regexp
 504           "\\([^ ()\f\t\n\r\v]+\\)\\(\(\\(.*\\)\)\\|\\)"))
 505
 506 (defvar org-babel-min-lines-for-block-output 10
 507   "The minimum number of lines for block output.
 508 If number of lines of output is equal to or exceeds this
 509 value, the output is placed in a #+begin_example...#+end_example
 510 block.  Otherwise the output is marked as literal by inserting
 511 colons at the starts of the lines.  This variable only takes
 512 effect if the :results output option is in effect.")
 513
 514 (defvar org-babel-noweb-error-langs nil
 515   "Languages for which Babel will raise literate programming errors.
 516 List of languages for which errors should be raised when the
 517 source code block satisfying a noweb reference in this language
 518 can not be resolved.")
 519
 520 (defvar org-babel-hash-show 4
 521   "Number of initial characters to show of a hidden results hash.")
 522
 523 (defvar org-babel-hash-show-time nil
 524   "Non-nil means show the time the code block was evaluated in the result hash.")
 525
 526 (defvar org-babel-after-execute-hook nil
 527   "Hook for functions to be called after `org-babel-execute-src-block'")
 528
 529 (defun org-babel-named-src-block-regexp-for-name (name)
 530   "This generates a regexp used to match a src block named NAME."
 531   (concat org-babel-src-name-regexp (regexp-quote name)
 532           "[ \t(]*[\r\n]\\(?:^#.*[\r\n]\\)*"
 533           (substring org-babel-src-block-regexp 1)))
 534
 535 (defun org-babel-named-data-regexp-for-name (name)
 536   "This generates a regexp used to match data named NAME."
 537   (concat org-babel-result-regexp (regexp-quote name) "\\([ \t]\\|$\\)"))
 538
 539 ;;; functions
 540 (defvar call-process-region)
 541 (defvar org-babel-current-src-block-location nil
 542   "Marker pointing to the src block currently being executed.
 543 This may also point to a call line or an inline code block.  If
 544 multiple blocks are being executed (e.g., in chained execution
 545 through use of the :var header argument) this marker points to
 546 the outer-most code block.")
 547
 548 ;;;###autoload
 549 (defun org-babel-execute-src-block (&optional arg info params)
 550   "Execute the current source code block.
 551 Insert the results of execution into the buffer.  Source code
 552 execution and the collection and formatting of results can be
 553 controlled through a variety of header arguments.
 554
 555 With prefix argument ARG, force re-execution even if an existing
 556 result cached in the buffer would otherwise have been returned.
 557
 558 Optionally supply a value for INFO in the form returned by
 559 `org-babel-get-src-block-info'.
 560
 561 Optionally supply a value for PARAMS which will be merged with
 562 the header arguments specified at the front of the source code
 563 block."
 564   (interactive)
 565   (let* ((org-babel-current-src-block-location
 566           (or org-babel-current-src-block-location
 567               (nth 6 info)
 568               (org-babel-where-is-src-block-head)))
 569          (info (if info
 570                    (copy-tree info)
 571                  (org-babel-get-src-block-info)))
 572          (merged-params (org-babel-merge-params (nth 2 info) params)))
 573     (when (org-babel-check-evaluate
 574            (let ((i info)) (setf (nth 2 i) merged-params) i))
 575       (let* ((params (if params
 576                          (org-babel-process-params merged-params)
 577                        (nth 2 info)))
 578              (cachep (and (not arg) (cdr (assoc :cache params))
 579                            (string= "yes" (cdr (assoc :cache params)))))
 580              (new-hash (when cachep (org-babel-sha1-hash info)))
 581              (old-hash (when cachep (org-babel-current-result-hash)))
 582              (cache-current-p (and (not arg) new-hash
 583                                    (equal new-hash old-hash))))
 584         (cond
 585          (cache-current-p
 586           (save-excursion ;; return cached result
 587             (goto-char (org-babel-where-is-src-block-result nil info))
 588             (end-of-line 1) (forward-char 1)
 589             (let ((result (org-babel-read-result)))
 590               (message (replace-regexp-in-string
 591                         "%" "%%" (format "%S" result))) result)))
 592          ((org-babel-confirm-evaluate
 593            (let ((i info)) (setf (nth 2 i) merged-params) i))
 594           (let* ((lang (nth 0 info))
 595                  (result-params (cdr (assoc :result-params params)))
 596                  (body (setf (nth 1 info)
 597                              (if (org-babel-noweb-p params :eval)
 598                                  (org-babel-expand-noweb-references info)
 599                                (nth 1 info))))
 600                  (dir (cdr (assoc :dir params)))
 601                  (default-directory
 602                    (or (and dir (file-name-as-directory (expand-file-name dir)))
 603                        default-directory))
 604                  (org-babel-call-process-region-original ;; for tramp handler
 605                   (or (org-bound-and-true-p
 606                        org-babel-call-process-region-original)
 607                       (symbol-function 'call-process-region)))
 608                  (indent (nth 5 info))
 609                  result cmd)
 610             (unwind-protect
 611                 (let ((call-process-region
 612                        (lambda (&rest args)
 613                          (apply 'org-babel-tramp-handle-call-process-region
 614                                 args))))
 615                   (let ((lang-check
 616                          (lambda (f)
 617                            (let ((f (intern (concat "org-babel-execute:" f))))
 618                              (when (fboundp f) f)))))
 619                     (setq cmd
 620                           (or (funcall lang-check lang)
 621                               (funcall lang-check
 622                                        (symbol-name
 623                                         (cdr (assoc lang org-src-lang-modes))))
 624                               (error "No org-babel-execute function for %s!"
 625                                      lang))))
 626                   (message "executing %s code block%s..."
 627                            (capitalize lang)
 628                            (if (nth 4 info) (format " (%s)" (nth 4 info)) ""))
 629                   (if (member "none" result-params)
 630                       (progn
 631                         (funcall cmd body params)
 632                         (message "result silenced")
 633                         (setq result nil))
 634                     (setq result
 635                           ((lambda (result)
 636                              (if (and (eq (cdr (assoc :result-type params))
 637                                           'value)
 638                                       (or (member "vector" result-params)
 639                                           (member "table" result-params))
 640                                       (not (listp result)))
 641                                  (list (list result)) result))
 642                            (funcall cmd body params)))
 643                     ;; if non-empty result and :file then write to :file
 644                     (when (cdr (assoc :file params))
 645                       (when result
 646                         (with-temp-file (cdr (assoc :file params))
 647                           (insert
 648                            (org-babel-format-result
 649                             result (cdr (assoc :sep (nth 2 info)))))))
 650                       (setq result (cdr (assoc :file params))))
 651                     ;; possibly perform post process provided its appropriate
 652                     (when (cdr (assoc :post params))
 653                       (let ((*this* (if (cdr (assoc :file params))
 654                                         (org-babel-result-to-file
 655                                          (cdr (assoc :file params))
 656                                          (when (assoc :file-desc params)
 657                                            (or (cdr (assoc :file-desc params))
 658                                                result)))
 659                                       result)))
 660                         (setq result (org-babel-ref-resolve
 661                                       (cdr (assoc :post params))))
 662                         (when (cdr (assoc :file params))
 663                           (setq result-params
 664                                 (remove "file" result-params)))))
 665                     (org-babel-insert-result
 666                      result result-params info new-hash indent lang))
 667                   (run-hooks 'org-babel-after-execute-hook)
 668                   result)
 669               (setq call-process-region
 670                     'org-babel-call-process-region-original)))))))))
 671
 672 (defun org-babel-expand-body:generic (body params &optional var-lines)
 673   "Expand BODY with PARAMS.
 674 Expand a block of code with org-babel according to its header
 675 arguments.  This generic implementation of body expansion is
 676 called for languages which have not defined their own specific
 677 org-babel-expand-body:lang function."
 678   (let ((pro (cdr (assoc :prologue params)))
 679         (epi (cdr (assoc :epilogue params))))
 680     (mapconcat #'identity
 681                (append (when pro (list pro))
 682                        var-lines
 683                        (list body)
 684                        (when epi (list epi)))
 685                "\n")))
 686
 687 ;;;###autoload
 688 (defun org-babel-expand-src-block (&optional arg info params)
 689   "Expand the current source code block.
 690 Expand according to the source code block's header
 691 arguments and pop open the results in a preview buffer."
 692   (interactive)
 693   (let* ((info (or info (org-babel-get-src-block-info)))
 694          (lang (nth 0 info))
 695          (params (setf (nth 2 info)
 696                        (sort (org-babel-merge-params (nth 2 info) params)
 697                              (lambda (el1 el2) (string< (symbol-name (car el1))
 698                                                         (symbol-name (car el2)))))))
 699          (body (setf (nth 1 info)
 700                      (if (org-babel-noweb-p params :eval)
 701                          (org-babel-expand-noweb-references info) (nth 1 info))))
 702          (expand-cmd (intern (concat "org-babel-expand-body:" lang)))
 703          (assignments-cmd (intern (concat "org-babel-variable-assignments:"
 704                                           lang)))
 705          (expanded
 706           (if (fboundp expand-cmd) (funcall expand-cmd body params)
 707             (org-babel-expand-body:generic
 708              body params (and (fboundp assignments-cmd)
 709                               (funcall assignments-cmd params))))))
 710     (if (org-called-interactively-p 'any)
 711         (org-edit-src-code
 712          nil expanded
 713          (concat "*Org-Babel Preview " (buffer-name) "[ " lang " ]*"))
 714       expanded)))
 715
 716 (defun org-babel-edit-distance (s1 s2)
 717   "Return the edit (levenshtein) distance between strings S1 S2."
 718   (let* ((l1 (length s1))
 719          (l2 (length s2))
 720          (dist (vconcat (mapcar (lambda (_) (make-vector (1+ l2) nil))
 721                                 (number-sequence 1 (1+ l1)))))
 722          (in (lambda (i j) (aref (aref dist i) j))))
 723     (setf (aref (aref dist 0) 0) 0)
 724     (dolist (j (number-sequence 1 l2))
 725       (setf (aref (aref dist 0) j) j))
 726     (dolist (i (number-sequence 1 l1))
 727       (setf (aref (aref dist i) 0) i)
 728       (dolist (j (number-sequence 1 l2))
 729         (setf (aref (aref dist i) j)
 730               (min
 731                (1+ (funcall in (1- i) j))
 732                (1+ (funcall in i (1- j)))
 733                (+ (if (equal (aref s1 (1- i)) (aref s2 (1- j))) 0 1)
 734                   (funcall in (1- i) (1- j)))))))
 735     (funcall in l1 l2)))
 736
 737 (defun org-babel-combine-header-arg-lists (original &rest others)
 738   "Combine a number of lists of header argument names and arguments."
 739   (let ((results (copy-sequence original)))
 740     (dolist (new-list others)
 741       (dolist (arg-pair new-list)
 742         (let ((header (car arg-pair))
 743               (args (cdr arg-pair)))
 744           (setq results
 745                 (cons arg-pair (org-remove-if
 746                                 (lambda (pair) (equal header (car pair)))
 747                                 results))))))
 748     results))
 749
 750 ;;;###autoload
 751 (defun org-babel-check-src-block ()
 752   "Check for misspelled header arguments in the current code block."
 753   (interactive)
 754   ;; TODO: report malformed code block
 755   ;; TODO: report incompatible combinations of header arguments
 756   ;; TODO: report uninitialized variables
 757   (let ((too-close 2) ;; <- control closeness to report potential match
 758         (names (mapcar #'symbol-name org-babel-header-arg-names)))
 759     (dolist (header (mapcar (lambda (arg) (substring (symbol-name (car arg)) 1))
 760                             (and (org-babel-where-is-src-block-head)
 761                                  (org-babel-parse-header-arguments
 762                                   (org-no-properties
 763                                    (match-string 4))))))
 764       (dolist (name names)
 765         (when (and (not (string= header name))
 766                    (<= (org-babel-edit-distance header name) too-close)
 767                    (not (member header names)))
 768           (error "Supplied header \"%S\" is suspiciously close to \"%S\""
 769                  header name))))
 770     (message "No suspicious header arguments found.")))
 771
 772 ;;;###autoload
 773 (defun org-babel-insert-header-arg ()
 774   "Insert a header argument selecting from lists of common args and values."
 775   (interactive)
 776   (let* ((lang (car (org-babel-get-src-block-info 'light)))
 777          (lang-headers (intern (concat "org-babel-header-args:" lang)))
 778          (headers (org-babel-combine-header-arg-lists
 779                    org-babel-common-header-args-w-values
 780                    (when (boundp lang-headers) (eval lang-headers))))
 781          (arg (org-icompleting-read
 782                "Header Arg: "
 783                (mapcar
 784                 (lambda (header-spec) (symbol-name (car header-spec)))
 785                 headers))))
 786     (insert ":" arg)
 787     (let ((vals (cdr (assoc (intern arg) headers))))
 788       (when vals
 789         (insert
 790          " "
 791          (cond
 792           ((eq vals :any)
 793            (read-from-minibuffer "value: "))
 794           ((listp vals)
 795            (mapconcat
 796             (lambda (group)
 797               (let ((arg (org-icompleting-read
 798                           "value: "
 799                           (cons "default" (mapcar #'symbol-name group)))))
 800                 (if (and arg (not (string= "default" arg)))
 801                     (concat arg " ")
 802                   "")))
 803             vals ""))))))))
 804
 805 ;; Add support for completing-read insertion of header arguments after ":"
 806 (defun org-babel-header-arg-expand ()
 807   "Call `org-babel-enter-header-arg-w-completion' in appropriate contexts."
 808   (when (and (equal (char-before) ?\:) (org-babel-where-is-src-block-head))
 809     (org-babel-enter-header-arg-w-completion (match-string 2))))
 810
 811 (defun org-babel-enter-header-arg-w-completion (&optional lang)
 812   "Insert header argument appropriate for LANG with completion."
 813   (let* ((lang-headers-var (intern (concat "org-babel-header-args:" lang)))
 814          (lang-headers (when (boundp lang-headers-var) (eval lang-headers-var)))
 815          (headers-w-values (org-babel-combine-header-arg-lists
 816                             org-babel-common-header-args-w-values lang-headers))
 817          (headers (mapcar #'symbol-name (mapcar #'car headers-w-values)))
 818          (header (org-completing-read "Header Arg: " headers))
 819          (args (cdr (assoc (intern header) headers-w-values)))
 820          (arg (when (and args (listp args))
 821                 (org-completing-read
 822                  (format "%s: " header)
 823                  (mapcar #'symbol-name (apply #'append args))))))
 824     (insert (concat header " " (or arg "")))
 825     (cons header arg)))
 826
 827 (add-hook 'org-tab-first-hook 'org-babel-header-arg-expand)
 828
 829 ;;;###autoload
 830 (defun org-babel-load-in-session (&optional arg info)
 831   "Load the body of the current source-code block.
 832 Evaluate the header arguments for the source block before
 833 entering the session.  After loading the body this pops open the
 834 session."
 835   (interactive)
 836   (let* ((info (or info (org-babel-get-src-block-info)))
 837          (lang (nth 0 info))
 838          (params (nth 2 info))
 839          (body (if (not info)
 840                    (user-error "No src code block at point")
 841                  (setf (nth 1 info)
 842                        (if (org-babel-noweb-p params :eval)
 843                            (org-babel-expand-noweb-references info)
 844                          (nth 1 info)))))
 845          (session (cdr (assoc :session params)))
 846          (dir (cdr (assoc :dir params)))
 847          (default-directory
 848            (or (and dir (file-name-as-directory dir)) default-directory))
 849          (cmd (intern (concat "org-babel-load-session:" lang))))
 850     (unless (fboundp cmd)
 851       (error "No org-babel-load-session function for %s!" lang))
 852     (pop-to-buffer (funcall cmd session body params))
 853     (end-of-line 1)))
 854
 855 ;;;###autoload
 856 (defun org-babel-initiate-session (&optional arg info)
 857   "Initiate session for current code block.
 858 If called with a prefix argument then resolve any variable
 859 references in the header arguments and assign these variables in
 860 the session.  Copy the body of the code block to the kill ring."
 861   (interactive "P")
 862   (let* ((info (or info (org-babel-get-src-block-info (not arg))))
 863          (lang (nth 0 info))
 864          (body (nth 1 info))
 865          (params (nth 2 info))
 866          (session (cdr (assoc :session params)))
 867          (dir (cdr (assoc :dir params)))
 868          (default-directory
 869            (or (and dir (file-name-as-directory dir)) default-directory))
 870          (init-cmd (intern (format "org-babel-%s-initiate-session" lang)))
 871          (prep-cmd (intern (concat "org-babel-prep-session:" lang))))
 872     (if (and (stringp session) (string= session "none"))
 873         (error "This block is not using a session!"))
 874     (unless (fboundp init-cmd)
 875       (error "No org-babel-initiate-session function for %s!" lang))
 876     (with-temp-buffer (insert (org-babel-trim body))
 877                       (copy-region-as-kill (point-min) (point-max)))
 878     (when arg
 879       (unless (fboundp prep-cmd)
 880         (error "No org-babel-prep-session function for %s!" lang))
 881       (funcall prep-cmd session params))
 882     (funcall init-cmd session params)))
 883
 884 ;;;###autoload
 885 (defun org-babel-switch-to-session (&optional arg info)
 886   "Switch to the session of the current code block.
 887 Uses `org-babel-initiate-session' to start the session.  If called
 888 with a prefix argument then this is passed on to
 889 `org-babel-initiate-session'."
 890   (interactive "P")
 891   (pop-to-buffer (org-babel-initiate-session arg info))
 892   (end-of-line 1))
 893
 894 (defalias 'org-babel-pop-to-session 'org-babel-switch-to-session)
 895
 896 ;;;###autoload
 897 (defun org-babel-switch-to-session-with-code (&optional arg info)
 898   "Switch to code buffer and display session."
 899   (interactive "P")
 900   (let ((swap-windows
 901          (lambda ()
 902            (let ((other-window-buffer (window-buffer (next-window))))
 903              (set-window-buffer (next-window) (current-buffer))
 904              (set-window-buffer (selected-window) other-window-buffer))
 905            (other-window 1)))
 906         (info (org-babel-get-src-block-info))
 907         (org-src-window-setup 'reorganize-frame))
 908     (save-excursion
 909       (org-babel-switch-to-session arg info))
 910     (org-edit-src-code)
 911     (funcall swap-windows)))
 912
 913 (defmacro org-babel-do-in-edit-buffer (&rest body)
 914   "Evaluate BODY in edit buffer if there is a code block at point.
 915 Return t if a code block was found at point, nil otherwise."
 916   `(let ((org-src-window-setup 'switch-invisibly))
 917      (when (and (org-babel-where-is-src-block-head)
 918                 (org-edit-src-code nil nil nil))
 919        (unwind-protect (progn ,@body)
 920          (if (org-bound-and-true-p org-edit-src-from-org-mode)
 921              (org-edit-src-exit)))
 922        t)))
 923 (def-edebug-spec org-babel-do-in-edit-buffer (body))
 924
 925 (defun org-babel-do-key-sequence-in-edit-buffer (key)
 926   "Read key sequence and execute the command in edit buffer.
 927 Enter a key sequence to be executed in the language major-mode
 928 edit buffer.  For example, TAB will alter the contents of the
 929 Org-mode code block according to the effect of TAB in the
 930 language major-mode buffer.  For languages that support
 931 interactive sessions, this can be used to send code from the Org
 932 buffer to the session for evaluation using the native major-mode
 933 evaluation mechanisms."
 934   (interactive "kEnter key-sequence to execute in edit buffer: ")
 935   (org-babel-do-in-edit-buffer
 936    (call-interactively
 937     (key-binding (or key (read-key-sequence nil))))))
 938
 939 (defvar org-bracket-link-regexp)
 940
 941 ;;;###autoload
 942 (defun org-babel-open-src-block-result (&optional re-run)
 943   "If `point' is on a src block then open the results of the
 944 source code block, otherwise return nil.  With optional prefix
 945 argument RE-RUN the source-code block is evaluated even if
 946 results already exist."
 947   (interactive "P")
 948   (let ((info (org-babel-get-src-block-info 'light)))
 949     (when info
 950       (save-excursion
 951         ;; go to the results, if there aren't any then run the block
 952         (goto-char (or (and (not re-run) (org-babel-where-is-src-block-result))
 953                        (progn (org-babel-execute-src-block)
 954                               (org-babel-where-is-src-block-result))))
 955         (end-of-line 1)
 956         (while (looking-at "[\n\r\t\f ]") (forward-char 1))
 957         ;; open the results
 958         (if (looking-at org-bracket-link-regexp)
 959             ;; file results
 960             (org-open-at-point)
 961           (let ((r (org-babel-format-result
 962                     (org-babel-read-result) (cdr (assoc :sep (nth 2 info))))))
 963             (pop-to-buffer (get-buffer-create "*Org-Babel Results*"))
 964             (delete-region (point-min) (point-max))
 965             (insert r)))
 966         t))))
 967
 968 ;;;###autoload
 969 (defmacro org-babel-map-src-blocks (file &rest body)
 970   "Evaluate BODY forms on each source-block in FILE.
 971 If FILE is nil evaluate BODY forms on source blocks in current
 972 buffer.  During evaluation of BODY the following local variables
 973 are set relative to the currently matched code block.
 974
 975 full-block ------- string holding the entirety of the code block
 976 beg-block -------- point at the beginning of the code block
 977 end-block -------- point at the end of the matched code block
 978 lang ------------- string holding the language of the code block
 979 beg-lang --------- point at the beginning of the lang
 980 end-lang --------- point at the end of the lang
 981 switches --------- string holding the switches
 982 beg-switches ----- point at the beginning of the switches
 983 end-switches ----- point at the end of the switches
 984 header-args ------ string holding the header-args
 985 beg-header-args -- point at the beginning of the header-args
 986 end-header-args -- point at the end of the header-args
 987 body ------------- string holding the body of the code block
 988 beg-body --------- point at the beginning of the body
 989 end-body --------- point at the end of the body"
 990   (declare (indent 1))
 991   (let ((tempvar (make-symbol "file")))
 992     `(let* ((,tempvar ,file)
 993             (visited-p (or (null ,tempvar)
 994                            (get-file-buffer (expand-file-name ,tempvar))))
 995             (point (point)) to-be-removed)
 996        (save-window-excursion
 997          (when ,tempvar (find-file ,tempvar))
 998          (setq to-be-removed (current-buffer))
 999          (goto-char (point-min))
1000          (while (re-search-forward org-babel-src-block-regexp nil t)
1001            (goto-char (match-beginning 0))
1002            (let ((full-block (match-string 0))
1003                  (beg-block (match-beginning 0))
1004                  (end-block (match-end 0))
1005                  (lang (match-string 2))
1006                  (beg-lang (match-beginning 2))
1007                  (end-lang (match-end 2))
1008                  (switches (match-string 3))
1009                  (beg-switches (match-beginning 3))
1010                  (end-switches (match-end 3))
1011                  (header-args (match-string 4))
1012                  (beg-header-args (match-beginning 4))
1013                  (end-header-args (match-end 4))
1014                  (body (match-string 5))
1015                  (beg-body (match-beginning 5))
1016                  (end-body (match-end 5)))
1017              ,@body
1018              (goto-char end-block))))
1019        (unless visited-p (kill-buffer to-be-removed))
1020        (goto-char point))))
1021 (def-edebug-spec org-babel-map-src-blocks (form body))
1022
1023 ;;;###autoload
1024 (defmacro org-babel-map-inline-src-blocks (file &rest body)
1025   "Evaluate BODY forms on each inline source-block in FILE.
1026 If FILE is nil evaluate BODY forms on source blocks in current
1027 buffer."
1028   (declare (indent 1))
1029   (let ((tempvar (make-symbol "file")))
1030     `(let* ((,tempvar ,file)
1031             (visited-p (or (null ,tempvar)
1032                            (get-file-buffer (expand-file-name ,tempvar))))
1033             (point (point)) to-be-removed)
1034        (save-window-excursion
1035          (when ,tempvar (find-file ,tempvar))
1036          (setq to-be-removed (current-buffer))
1037          (goto-char (point-min))
1038          (while (re-search-forward org-babel-inline-src-block-regexp nil t)
1039            (goto-char (match-beginning 1))
1040            (save-match-data ,@body)
1041            (goto-char (match-end 0))))
1042        (unless visited-p (kill-buffer to-be-removed))
1043        (goto-char point))))
1044 (def-edebug-spec org-babel-map-inline-src-blocks (form body))
1045
1046 (defvar org-babel-lob-one-liner-regexp)
1047
1048 ;;;###autoload
1049 (defmacro org-babel-map-call-lines (file &rest body)
1050   "Evaluate BODY forms on each call line in FILE.
1051 If FILE is nil evaluate BODY forms on source blocks in current
1052 buffer."
1053   (declare (indent 1))
1054   (let ((tempvar (make-symbol "file")))
1055     `(let* ((,tempvar ,file)
1056             (visited-p (or (null ,tempvar)
1057                            (get-file-buffer (expand-file-name ,tempvar))))
1058             (point (point)) to-be-removed)
1059        (save-window-excursion
1060          (when ,tempvar (find-file ,tempvar))
1061          (setq to-be-removed (current-buffer))
1062          (goto-char (point-min))
1063          (while (re-search-forward org-babel-lob-one-liner-regexp nil t)
1064            (goto-char (match-beginning 1))
1065            (save-match-data ,@body)
1066            (goto-char (match-end 0))))
1067        (unless visited-p (kill-buffer to-be-removed))
1068        (goto-char point))))
1069 (def-edebug-spec org-babel-map-call-lines (form body))
1070
1071 ;;;###autoload
1072 (defmacro org-babel-map-executables (file &rest body)
1073   (declare (indent 1))
1074   (let ((tempvar (make-symbol "file"))
1075         (rx (make-symbol "rx")))
1076     `(let* ((,tempvar ,file)
1077             (,rx (concat "\\(" org-babel-src-block-regexp
1078                          "\\|" org-babel-inline-src-block-regexp
1079                          "\\|" org-babel-lob-one-liner-regexp "\\)"))
1080             (visited-p (or (null ,tempvar)
1081                            (get-file-buffer (expand-file-name ,tempvar))))
1082             (point (point)) to-be-removed)
1083        (save-window-excursion
1084          (when ,tempvar (find-file ,tempvar))
1085          (setq to-be-removed (current-buffer))
1086          (goto-char (point-min))
1087          (while (re-search-forward ,rx nil t)
1088            (goto-char (match-beginning 1))
1089            (when (looking-at org-babel-inline-src-block-regexp)(forward-char 1))
1090            (save-match-data ,@body)
1091            (goto-char (match-end 0))))
1092        (unless visited-p (kill-buffer to-be-removed))
1093        (goto-char point))))
1094 (def-edebug-spec org-babel-map-executables (form body))
1095
1096 ;;;###autoload
1097 (defun org-babel-execute-buffer (&optional arg)
1098   "Execute source code blocks in a buffer.
1099 Call `org-babel-execute-src-block' on every source block in
1100 the current buffer."
1101   (interactive "P")
1102   (org-babel-eval-wipe-error-buffer)
1103   (org-save-outline-visibility t
1104     (org-babel-map-executables nil
1105       (if (looking-at org-babel-lob-one-liner-regexp)
1106           (org-babel-lob-execute-maybe)
1107         (org-babel-execute-src-block arg)))))
1108
1109 ;;;###autoload
1110 (defun org-babel-execute-subtree (&optional arg)
1111   "Execute source code blocks in a subtree.
1112 Call `org-babel-execute-src-block' on every source block in
1113 the current subtree."
1114   (interactive "P")
1115   (save-restriction
1116     (save-excursion
1117       (org-narrow-to-subtree)
1118       (org-babel-execute-buffer arg)
1119       (widen))))
1120
1121 ;;;###autoload
1122 (defun org-babel-sha1-hash (&optional info)
1123   "Generate an sha1 hash based on the value of info."
1124   (interactive)
1125   (let ((print-level nil)
1126         (info (or info (org-babel-get-src-block-info))))
1127     (setf (nth 2 info)
1128           (sort (copy-sequence (nth 2 info))
1129                 (lambda (a b) (string< (car a) (car b)))))
1130     (let* ((rm (lambda (lst)
1131                  (dolist (p '("replace" "silent" "none"
1132                               "append" "prepend"))
1133                    (setq lst (remove p lst)))
1134                  lst))
1135            (norm (lambda (arg)
1136                    (let ((v (if (and (listp (cdr arg)) (null (cddr arg)))
1137                                 (copy-sequence (cdr arg))
1138                               (cdr arg))))
1139                      (when (and v (not (and (sequencep v)
1140                                             (not (consp v))
1141                                             (= (length v) 0))))
1142                        (cond
1143                         ((and (listp v) ; lists are sorted
1144                               (member (car arg) '(:result-params)))
1145                          (sort (funcall rm v) #'string<))
1146                         ((and (stringp v) ; strings are sorted
1147                               (member (car arg) '(:results :exports)))
1148                          (mapconcat #'identity (sort (funcall rm (split-string v))
1149                                                      #'string<) " "))
1150                         (t v)))))))
1151       ((lambda (hash)
1152          (when (org-called-interactively-p 'interactive) (message hash)) hash)
1153        (let ((it (format "%s-%s"
1154                          (mapconcat
1155                           #'identity
1156                           (delq nil (mapcar (lambda (arg)
1157                                               (let ((normalized (funcall norm arg)))
1158                                                 (when normalized
1159                                                   (format "%S" normalized))))
1160                                             (nth 2 info))) ":")
1161                          (nth 1 info))))
1162          (sha1 it))))))
1163
1164 (defun org-babel-current-result-hash ()
1165   "Return the current in-buffer hash."
1166   (org-babel-where-is-src-block-result)
1167   (org-no-properties (match-string 5)))
1168
1169 (defun org-babel-set-current-result-hash (hash)
1170   "Set the current in-buffer hash to HASH."
1171   (org-babel-where-is-src-block-result)
1172   (save-excursion (goto-char (match-beginning 5))
1173                   (mapc #'delete-overlay (overlays-at (point)))
1174                   (forward-char org-babel-hash-show)
1175                   (mapc #'delete-overlay (overlays-at (point)))
1176                   (replace-match hash nil nil nil 5)
1177                   (goto-char (point-at-bol))
1178                   (org-babel-hide-hash)))
1179
1180 (defun org-babel-hide-hash ()
1181   "Hide the hash in the current results line.
1182 Only the initial `org-babel-hash-show' characters of the hash
1183 will remain visible."
1184   (add-to-invisibility-spec '(org-babel-hide-hash . t))
1185   (save-excursion
1186     (when (and (re-search-forward org-babel-result-regexp nil t)
1187                (match-string 5))
1188       (let* ((start (match-beginning 5))
1189              (hide-start (+ org-babel-hash-show start))
1190              (end (match-end 5))
1191              (hash (match-string 5))
1192              ov1 ov2)
1193         (setq ov1 (make-overlay start hide-start))
1194         (setq ov2 (make-overlay hide-start end))
1195         (overlay-put ov2 'invisible 'org-babel-hide-hash)
1196         (overlay-put ov1 'babel-hash hash)))))
1197
1198 (defun org-babel-hide-all-hashes ()
1199   "Hide the hash in the current buffer.
1200 Only the initial `org-babel-hash-show' characters of each hash
1201 will remain visible.  This function should be called as part of
1202 the `org-mode-hook'."
1203   (save-excursion
1204     (while (and (not org-babel-hash-show-time)
1205                 (re-search-forward org-babel-result-regexp nil t))
1206       (goto-char (match-beginning 0))
1207       (org-babel-hide-hash)
1208       (goto-char (match-end 0)))))
1209 (add-hook 'org-mode-hook 'org-babel-hide-all-hashes)
1210
1211 (defun org-babel-hash-at-point (&optional point)
1212   "Return the value of the hash at POINT.
1213 The hash is also added as the last element of the kill ring.
1214 This can be called with C-c C-c."
1215   (interactive)
1216   (let ((hash (car (delq nil (mapcar
1217                               (lambda (ol) (overlay-get ol 'babel-hash))
1218                               (overlays-at (or point (point))))))))
1219     (when hash (kill-new hash) (message hash))))
1220 (add-hook 'org-ctrl-c-ctrl-c-hook 'org-babel-hash-at-point)
1221
1222 (defun org-babel-result-hide-spec ()
1223   "Hide portions of results lines.
1224 Add `org-babel-hide-result' as an invisibility spec for hiding
1225 portions of results lines."
1226   (add-to-invisibility-spec '(org-babel-hide-result . t)))
1227 (add-hook 'org-mode-hook 'org-babel-result-hide-spec)
1228
1229 (defvar org-babel-hide-result-overlays nil
1230   "Overlays hiding results.")
1231
1232 (defun org-babel-result-hide-all ()
1233   "Fold all results in the current buffer."
1234   (interactive)
1235   (org-babel-show-result-all)
1236   (save-excursion
1237     (while (re-search-forward org-babel-result-regexp nil t)
1238       (save-excursion (goto-char (match-beginning 0))
1239                       (org-babel-hide-result-toggle-maybe)))))
1240
1241 (defun org-babel-show-result-all ()
1242   "Unfold all results in the current buffer."
1243   (mapc 'delete-overlay org-babel-hide-result-overlays)
1244   (setq org-babel-hide-result-overlays nil))
1245
1246 ;;;###autoload
1247 (defun org-babel-hide-result-toggle-maybe ()
1248   "Toggle visibility of result at point."
1249   (interactive)
1250   (let ((case-fold-search t))
1251     (if (save-excursion
1252           (beginning-of-line 1)
1253           (looking-at org-babel-result-regexp))
1254         (progn (org-babel-hide-result-toggle)
1255                t) ;; to signal that we took action
1256       nil))) ;; to signal that we did not
1257
1258 (defun org-babel-hide-result-toggle (&optional force)
1259   "Toggle the visibility of the current result."
1260   (interactive)
1261   (save-excursion
1262     (beginning-of-line)
1263     (if (re-search-forward org-babel-result-regexp nil t)
1264         (let ((start (progn (beginning-of-line 2) (- (point) 1)))
1265               (end (progn
1266                      (while (looking-at org-babel-multi-line-header-regexp)
1267                        (forward-line 1))
1268                      (goto-char (- (org-babel-result-end) 1)) (point)))
1269               ov)
1270           (if (memq t (mapcar (lambda (overlay)
1271                                 (eq (overlay-get overlay 'invisible)
1272                                     'org-babel-hide-result))
1273                               (overlays-at start)))
1274               (if (or (not force) (eq force 'off))
1275                   (mapc (lambda (ov)
1276                           (when (member ov org-babel-hide-result-overlays)
1277                             (setq org-babel-hide-result-overlays
1278                                   (delq ov org-babel-hide-result-overlays)))
1279                           (when (eq (overlay-get ov 'invisible)
1280                                     'org-babel-hide-result)
1281                             (delete-overlay ov)))
1282                         (overlays-at start)))
1283             (setq ov (make-overlay start end))
1284             (overlay-put ov 'invisible 'org-babel-hide-result)
1285             ;; make the block accessible to isearch
1286             (overlay-put
1287              ov 'isearch-open-invisible
1288              (lambda (ov)
1289                (when (member ov org-babel-hide-result-overlays)
1290                  (setq org-babel-hide-result-overlays
1291                        (delq ov org-babel-hide-result-overlays)))
1292                (when (eq (overlay-get ov 'invisible)
1293                          'org-babel-hide-result)
1294                  (delete-overlay ov))))
1295             (push ov org-babel-hide-result-overlays)))
1296       (error "Not looking at a result line"))))
1297
1298 ;; org-tab-after-check-for-cycling-hook
1299 (add-hook 'org-tab-first-hook 'org-babel-hide-result-toggle-maybe)
1300 ;; Remove overlays when changing major mode
1301 (add-hook 'org-mode-hook
1302           (lambda () (org-add-hook 'change-major-mode-hook
1303                                    'org-babel-show-result-all 'append 'local)))
1304
1305 (defvar org-file-properties)
1306 (defun org-babel-params-from-properties (&optional lang)
1307   "Retrieve parameters specified as properties.
1308 Return a list of association lists of source block params
1309 specified in the properties of the current outline entry."
1310   (save-match-data
1311     (list
1312      ;; DEPRECATED header arguments specified as separate property at
1313      ;; point of definition
1314      (let (val sym)
1315        (org-babel-parse-multiple-vars
1316         (delq nil
1317               (mapcar
1318                (lambda (header-arg)
1319                  (and (setq val (org-entry-get (point) header-arg t))
1320                       (cons (intern (concat ":" header-arg))
1321                             (org-babel-read val))))
1322                (mapcar
1323                 #'symbol-name
1324                 (mapcar
1325                  #'car
1326                  (org-babel-combine-header-arg-lists
1327                   org-babel-common-header-args-w-values
1328                   (progn
1329                     (setq sym (intern (concat "org-babel-header-args:" lang)))
1330                     (and (boundp sym) (eval sym))))))))))
1331      ;; header arguments specified with the header-args property at
1332      ;; point of call
1333      (org-babel-parse-header-arguments
1334       (org-entry-get org-babel-current-src-block-location
1335                      "header-args" 'inherit))
1336      (when lang ;; language-specific header arguments at point of call
1337          (org-babel-parse-header-arguments
1338           (org-entry-get org-babel-current-src-block-location
1339                          (concat "header-args:" lang) 'inherit))))))
1340
1341 (defvar org-src-preserve-indentation)
1342 (defun org-babel-parse-src-block-match ()
1343   "Parse the results from a match of the `org-babel-src-block-regexp'."
1344   (let* ((block-indentation (length (match-string 1)))
1345          (lang (org-no-properties (match-string 2)))
1346          (lang-headers (intern (concat "org-babel-default-header-args:" lang)))
1347          (switches (match-string 3))
1348          (body (org-no-properties
1349                 (let* ((body (match-string 5))
1350                        (sub-length (- (length body) 1)))
1351                   (if (and (> sub-length 0)
1352                            (string= "\n" (substring body sub-length)))
1353                       (substring body 0 sub-length)
1354                     (or body "")))))
1355          (preserve-indentation (or org-src-preserve-indentation
1356                                    (save-match-data
1357                                      (string-match "-i\\>" switches)))))
1358     (list lang
1359           ;; get block body less properties, protective commas, and indentation
1360           (with-temp-buffer
1361             (save-match-data
1362               (insert (org-unescape-code-in-string body))
1363               (unless preserve-indentation (org-do-remove-indentation))
1364               (buffer-string)))
1365           (apply #'org-babel-merge-params
1366                  org-babel-default-header-args
1367                  (when (boundp lang-headers) (eval lang-headers))
1368                  (append
1369                   (org-babel-params-from-properties lang)
1370                   (list (org-babel-parse-header-arguments
1371                          (org-no-properties (or (match-string 4) ""))))))
1372           switches
1373           block-indentation)))
1374
1375 (defun org-babel-parse-inline-src-block-match ()
1376   "Parse the results from a match of the `org-babel-inline-src-block-regexp'."
1377   (let* ((lang (org-no-properties (match-string 2)))
1378          (lang-headers (intern (concat "org-babel-default-header-args:" lang))))
1379     (list lang
1380           (org-unescape-code-in-string (org-no-properties (match-string 5)))
1381           (apply #'org-babel-merge-params
1382                  org-babel-default-inline-header-args
1383                  (if (boundp lang-headers) (eval lang-headers) nil)
1384                  (append
1385                   (org-babel-params-from-properties lang)
1386                   (list (org-babel-parse-header-arguments
1387                          (org-no-properties (or (match-string 4) "")))))))))
1388
1389 (defun org-babel-balanced-split (string alts)
1390   "Split STRING on instances of ALTS.
1391 ALTS is a cons of two character options where each option may be
1392 either the numeric code of a single character or a list of
1393 character alternatives.  For example to split on balanced
1394 instances of \"[ \t]:\" set ALTS to '((32 9) . 58)."
1395   (let* ((matches (lambda (ch spec) (if (listp spec) (member ch spec) (equal spec ch))))
1396          (matched (lambda (ch last)
1397                     (if (consp alts)
1398                         (and (funcall matches ch (cdr alts))
1399                              (funcall matches last (car alts)))
1400                       (funcall matches ch alts))))
1401          (balance 0) (last 0)
1402          quote partial lst)
1403     (mapc (lambda (ch)  ; split on [], (), "" balanced instances of [ \t]:
1404             (setq balance (+ balance
1405                              (cond ((or (equal 91 ch) (equal 40 ch)) 1)
1406                                    ((or (equal 93 ch) (equal 41 ch)) -1)
1407                                    (t 0))))
1408             (when (and (equal 34 ch) (not (equal 92 last)))
1409               (setq quote (not quote)))
1410             (setq partial (cons ch partial))
1411             (when (and (= balance 0) (not quote) (funcall matched ch last))
1412               (setq lst (cons (apply #'string (nreverse
1413                                                (if (consp alts)
1414                                                    (cddr partial)
1415                                                  (cdr partial))))
1416                               lst))
1417               (setq partial nil))
1418             (setq last ch))
1419           (string-to-list string))
1420     (nreverse (cons (apply #'string (nreverse partial)) lst))))
1421
1422 (defun org-babel-join-splits-near-ch (ch list)
1423   "Join splits where \"=\" is on either end of the split."
1424   (let ((last= (lambda (str) (= ch (aref str (1- (length str))))))
1425         (first= (lambda (str) (= ch (aref str 0)))))
1426     (reverse
1427      (org-reduce (lambda (acc el)
1428                    (let ((head (car acc)))
1429                      (if (and head (or (funcall last= head) (funcall first= el)))
1430                          (cons (concat head el) (cdr acc))
1431                        (cons el acc))))
1432                  list :initial-value nil))))
1433
1434 (defun org-babel-parse-header-arguments (arg-string)
1435   "Parse a string of header arguments returning an alist."
1436   (when (> (length arg-string) 0)
1437     (org-babel-parse-multiple-vars
1438      (delq nil
1439            (mapcar
1440             (lambda (arg)
1441               (if (string-match
1442                    "\\([^ \f\t\n\r\v]+\\)[ \f\t\n\r\v]+\\([^ \f\t\n\r\v]+.*\\)"
1443                    arg)
1444                   (cons (intern (match-string 1 arg))
1445                         (org-babel-read (org-babel-chomp (match-string 2 arg))))
1446                 (cons (intern (org-babel-chomp arg)) nil)))
1447             ((lambda (raw)
1448                (cons (car raw) (mapcar (lambda (r) (concat ":" r)) (cdr raw))))
1449              (org-babel-balanced-split arg-string '((32 9) . 58))))))))
1450
1451 (defun org-babel-parse-multiple-vars (header-arguments)
1452   "Expand multiple variable assignments behind a single :var keyword.
1453
1454 This allows expression of multiple variables with one :var as
1455 shown below.
1456
1457 #+PROPERTY: var foo=1, bar=2"
1458   (let (results)
1459     (mapc (lambda (pair)
1460             (if (eq (car pair) :var)
1461                 (mapcar (lambda (v) (push (cons :var (org-babel-trim v)) results))
1462                         (org-babel-join-splits-near-ch
1463                          61 (org-babel-balanced-split (cdr pair) 32)))
1464               (push pair results)))
1465           header-arguments)
1466     (nreverse results)))
1467
1468 (defun org-babel-process-params (params)
1469   "Expand variables in PARAMS and add summary parameters."
1470   (let* ((processed-vars (mapcar (lambda (el)
1471                                    (if (consp (cdr el))
1472                                        (cdr el)
1473                                      (org-babel-ref-parse (cdr el))))
1474                                  (org-babel-get-header params :var)))
1475          (vars-and-names (if (and (assoc :colname-names params)
1476                                   (assoc :rowname-names params))
1477                              (list processed-vars)
1478                            (org-babel-disassemble-tables
1479                             processed-vars
1480                             (cdr (assoc :hlines params))
1481                             (cdr (assoc :colnames params))
1482                             (cdr (assoc :rownames params)))))
1483          (raw-result (or (cdr (assoc :results params)) ""))
1484          (result-params (append
1485                          (split-string (if (stringp raw-result)
1486                                            raw-result
1487                                          (eval raw-result)))
1488                          (cdr (assoc :result-params params)))))
1489     (append
1490      (mapcar (lambda (var) (cons :var var)) (car vars-and-names))
1491      (list
1492       (cons :colname-names (or (cdr (assoc :colname-names params))
1493                                (cadr  vars-and-names)))
1494       (cons :rowname-names (or (cdr (assoc :rowname-names params))
1495                                (caddr vars-and-names)))
1496       (cons :result-params result-params)
1497       (cons :result-type  (cond ((member "output" result-params) 'output)
1498                                 ((member "value" result-params) 'value)
1499                                 (t 'value))))
1500      (org-babel-get-header params :var 'other))))
1501
1502 ;; row and column names
1503 (defun org-babel-del-hlines (table)
1504   "Remove all 'hlines from TABLE."
1505   (remove 'hline table))
1506
1507 (defun org-babel-get-colnames (table)
1508   "Return the column names of TABLE.
1509 Return a cons cell, the `car' of which contains the TABLE less
1510 colnames, and the `cdr' of which contains a list of the column
1511 names."
1512   (if (equal 'hline (nth 1 table))
1513       (cons (cddr table) (car table))
1514     (cons (cdr table) (car table))))
1515
1516 (defun org-babel-get-rownames (table)
1517   "Return the row names of TABLE.
1518 Return a cons cell, the `car' of which contains the TABLE less
1519 rownames, and the `cdr' of which contains a list of the rownames.
1520 Note: this function removes any hlines in TABLE."
1521   (let* ((table (org-babel-del-hlines table))
1522          (rownames (funcall (lambda ()
1523                               (let ((tp table))
1524                                 (mapcar
1525                                  (lambda (row)
1526                                    (prog1
1527                                        (pop (car tp))
1528                                      (setq tp (cdr tp))))
1529                                  table))))))
1530     (cons table rownames)))
1531
1532 (defun org-babel-put-colnames (table colnames)
1533   "Add COLNAMES to TABLE if they exist."
1534   (if colnames (apply 'list colnames 'hline table) table))
1535
1536 (defun org-babel-put-rownames (table rownames)
1537   "Add ROWNAMES to TABLE if they exist."
1538   (if rownames
1539       (mapcar (lambda (row)
1540                 (if (listp row)
1541                     (cons (or (pop rownames) "") row)
1542                   row)) table)
1543     table))
1544
1545 (defun org-babel-pick-name (names selector)
1546   "Select one out of an alist of row or column names.
1547 SELECTOR can be either a list of names in which case those names
1548 will be returned directly, or an index into the list NAMES in
1549 which case the indexed names will be return."
1550   (if (listp selector)
1551       selector
1552     (when names
1553       (if (and selector (symbolp selector) (not (equal t selector)))
1554           (cdr (assoc selector names))
1555         (if (integerp selector)
1556             (nth (- selector 1) names)
1557           (cdr (car (last names))))))))
1558
1559 (defun org-babel-disassemble-tables (vars hlines colnames rownames)
1560   "Parse tables for further processing.
1561 Process the variables in VARS according to the HLINES,
1562 ROWNAMES and COLNAMES header arguments.  Return a list consisting
1563 of the vars, cnames and rnames."
1564   (let (cnames rnames)
1565     (list
1566      (mapcar
1567       (lambda (var)
1568         (when (listp (cdr var))
1569           (when (and (not (equal colnames "no"))
1570                      (or colnames (and (equal (nth 1 (cdr var)) 'hline)
1571                                        (not (member 'hline (cddr (cdr var)))))))
1572             (let ((both (org-babel-get-colnames (cdr var))))
1573               (setq cnames (cons (cons (car var) (cdr both))
1574                                  cnames))
1575               (setq var (cons (car var) (car both)))))
1576           (when (and rownames (not (equal rownames "no")))
1577             (let ((both (org-babel-get-rownames (cdr var))))
1578               (setq rnames (cons (cons (car var) (cdr both))
1579                                  rnames))
1580               (setq var (cons (car var) (car both)))))
1581           (when (and hlines (not (equal hlines "yes")))
1582             (setq var (cons (car var) (org-babel-del-hlines (cdr var))))))
1583         var)
1584       vars)
1585      (reverse cnames) (reverse rnames))))
1586
1587 (defun org-babel-reassemble-table (table colnames rownames)
1588   "Add column and row names to a table.
1589 Given a TABLE and set of COLNAMES and ROWNAMES add the names
1590 to the table for reinsertion to org-mode."
1591   (if (listp table)
1592       ((lambda (table)
1593          (if (and colnames (listp (car table)) (= (length (car table))
1594                                                   (length colnames)))
1595              (org-babel-put-colnames table colnames) table))
1596        (if (and rownames (= (length table) (length rownames)))
1597            (org-babel-put-rownames table rownames) table))
1598     table))
1599
1600 (defun org-babel-where-is-src-block-head ()
1601   "Find where the current source block begins.
1602 Return the point at the beginning of the current source
1603 block.  Specifically at the beginning of the #+BEGIN_SRC line.
1604 If the point is not on a source block then return nil."
1605   (let ((initial (point)) (case-fold-search t) top bottom)
1606     (or
1607      (save-excursion ;; on a source name line or a #+header line
1608        (beginning-of-line 1)
1609        (and (or (looking-at org-babel-src-name-regexp)
1610                 (looking-at org-babel-multi-line-header-regexp))
1611             (progn
1612               (while (and (forward-line 1)
1613                           (or (looking-at org-babel-src-name-regexp)
1614                               (looking-at org-babel-multi-line-header-regexp))))
1615               (looking-at org-babel-src-block-regexp))
1616             (point)))
1617      (save-excursion ;; on a #+begin_src line
1618        (beginning-of-line 1)
1619        (and (looking-at org-babel-src-block-regexp)
1620             (point)))
1621      (save-excursion ;; inside a src block
1622        (and
1623         (re-search-backward "^[ \t]*#\\+begin_src" nil t) (setq top (point))
1624         (re-search-forward "^[ \t]*#\\+end_src" nil t) (setq bottom (point))
1625         (< top initial) (< initial bottom)
1626         (progn (goto-char top) (beginning-of-line 1)
1627                (looking-at org-babel-src-block-regexp))
1628         (point-marker))))))
1629
1630 ;;;###autoload
1631 (defun org-babel-goto-src-block-head ()
1632   "Go to the beginning of the current code block."
1633   (interactive)
1634   ((lambda (head)
1635      (if head (goto-char head) (error "Not currently in a code block")))
1636    (org-babel-where-is-src-block-head)))
1637
1638 ;;;###autoload
1639 (defun org-babel-goto-named-src-block (name)
1640   "Go to a named source-code block."
1641   (interactive
1642    (let ((completion-ignore-case t)
1643          (case-fold-search t)
1644          (under-point (thing-at-point 'line)))
1645      (list (org-icompleting-read
1646             "source-block name: " (org-babel-src-block-names) nil t
1647             (cond
1648              ;; noweb
1649              ((string-match (org-babel-noweb-wrap) under-point)
1650               (let ((block-name (match-string 1 under-point)))
1651                 (string-match "[^(]*" block-name)
1652                 (match-string 0 block-name)))
1653              ;; #+call:
1654              ((string-match org-babel-lob-one-liner-regexp under-point)
1655               (let ((source-info (car (org-babel-lob-get-info))))
1656                 (if (string-match "^\\([^\\[]+?\\)\\(\\[.*\\]\\)?(" source-info)
1657                     (let ((source-name (match-string 1 source-info)))
1658                       source-name))))
1659              ;; #+results:
1660              ((string-match (concat "#\\+" org-babel-results-keyword
1661                                     "\\:\s+\\([^\\(]*\\)") under-point)
1662               (match-string 1 under-point))
1663              ;; symbol-at-point
1664              ((and (thing-at-point 'symbol))
1665               (org-babel-find-named-block (thing-at-point 'symbol))
1666               (thing-at-point 'symbol))
1667              (""))))))
1668   (let ((point (org-babel-find-named-block name)))
1669     (if point
1670         ;; taken from `org-open-at-point'
1671         (progn (org-mark-ring-push) (goto-char point) (org-show-context))
1672       (message "source-code block '%s' not found in this buffer" name))))
1673
1674 (defun org-babel-find-named-block (name)
1675   "Find a named source-code block.
1676 Return the location of the source block identified by source
1677 NAME, or nil if no such block exists.  Set match data according to
1678 org-babel-named-src-block-regexp."
1679   (save-excursion
1680     (let ((case-fold-search t)
1681           (regexp (org-babel-named-src-block-regexp-for-name name)) msg)
1682       (goto-char (point-min))
1683       (when (or (re-search-forward regexp nil t)
1684                 (re-search-backward regexp nil t))
1685         (match-beginning 0)))))
1686
1687 (defun org-babel-src-block-names (&optional file)
1688   "Returns the names of source blocks in FILE or the current buffer."
1689   (save-excursion
1690     (when file (find-file file)) (goto-char (point-min))
1691     (let ((case-fold-search t) names)
1692       (while (re-search-forward org-babel-src-name-w-name-regexp nil t)
1693         (setq names (cons (match-string 3) names)))
1694       names)))
1695
1696 ;;;###autoload
1697 (defun org-babel-goto-named-result (name)
1698   "Go to a named result."
1699   (interactive
1700    (let ((completion-ignore-case t))
1701      (list (org-icompleting-read "source-block name: "
1702                                  (org-babel-result-names) nil t))))
1703   (let ((point (org-babel-find-named-result name)))
1704     (if point
1705         ;; taken from `org-open-at-point'
1706         (progn (goto-char point) (org-show-context))
1707       (message "result '%s' not found in this buffer" name))))
1708
1709 (defun org-babel-find-named-result (name &optional point)
1710   "Find a named result.
1711 Return the location of the result named NAME in the current
1712 buffer or nil if no such result exists."
1713   (save-excursion
1714     (let ((case-fold-search t))
1715       (goto-char (or point (point-min)))
1716       (catch 'is-a-code-block
1717         (when (re-search-forward
1718                (concat org-babel-result-regexp
1719                        "[ \t]" (regexp-quote name) "[ \t]*[\n\f\v\r]") nil t)
1720           (when (and (string= "name" (downcase (match-string 1)))
1721                      (or (beginning-of-line 1)
1722                          (looking-at org-babel-src-block-regexp)
1723                          (looking-at org-babel-multi-line-header-regexp)
1724                          (looking-at org-babel-lob-one-liner-regexp)))
1725             (throw 'is-a-code-block (org-babel-find-named-result name (point))))
1726           (beginning-of-line 0) (point))))))
1727
1728 (defun org-babel-result-names (&optional file)
1729   "Returns the names of results in FILE or the current buffer."
1730   (save-excursion
1731     (when file (find-file file)) (goto-char (point-min))
1732     (let ((case-fold-search t) names)
1733       (while (re-search-forward org-babel-result-w-name-regexp nil t)
1734         (setq names (cons (match-string 4) names)))
1735       names)))
1736
1737 ;;;###autoload
1738 (defun org-babel-next-src-block (&optional arg)
1739   "Jump to the next source block.
1740 With optional prefix argument ARG, jump forward ARG many source blocks."
1741   (interactive "p")
1742   (org-next-block arg nil org-babel-src-block-regexp))
1743
1744 ;;;###autoload
1745 (defun org-babel-previous-src-block (&optional arg)
1746   "Jump to the previous source block.
1747 With optional prefix argument ARG, jump backward ARG many source blocks."
1748   (interactive "p")
1749   (org-previous-block arg org-babel-src-block-regexp))
1750
1751 (defvar org-babel-load-languages)
1752
1753 ;;;###autoload
1754 (defun org-babel-mark-block ()
1755   "Mark current src block."
1756   (interactive)
1757   ((lambda (head)
1758      (when head
1759        (save-excursion
1760          (goto-char head)
1761          (looking-at org-babel-src-block-regexp))
1762        (push-mark (match-end 5) nil t)
1763        (goto-char (match-beginning 5))))
1764    (org-babel-where-is-src-block-head)))
1765
1766 (defun org-babel-demarcate-block (&optional arg)
1767   "Wrap or split the code in the region or on the point.
1768 When called from inside of a code block the current block is
1769 split.  When called from outside of a code block a new code block
1770 is created.  In both cases if the region is demarcated and if the
1771 region is not active then the point is demarcated."
1772   (interactive "P")
1773   (let ((info (org-babel-get-src-block-info 'light))
1774         (headers (progn (org-babel-where-is-src-block-head)
1775                         (match-string 4)))
1776         (stars (concat (make-string (or (org-current-level) 1) ?*) " ")))
1777     (if info
1778         (mapc
1779          (lambda (place)
1780            (save-excursion
1781              (goto-char place)
1782              (let ((lang (nth 0 info))
1783                    (indent (make-string (nth 5 info) ? )))
1784                (when (string-match "^[[:space:]]*$"
1785                                    (buffer-substring (point-at-bol)
1786                                                      (point-at-eol)))
1787                  (delete-region (point-at-bol) (point-at-eol)))
1788                (insert (concat
1789                         (if (looking-at "^") "" "\n")
1790                         indent "#+end_src\n"
1791                         (if arg stars indent) "\n"
1792                         indent "#+begin_src " lang
1793                         (if (> (length headers) 1)
1794                             (concat " " headers) headers)
1795                         (if (looking-at "[\n\r]")
1796                             ""
1797                           (concat "\n" (make-string (current-column) ? )))))))
1798            (move-end-of-line 2))
1799          (sort (if (org-region-active-p) (list (mark) (point)) (list (point))) #'>))
1800       (let ((start (point))
1801             (lang (org-icompleting-read
1802                    "Lang: "
1803                    (mapcar #'symbol-name
1804                            (delete-dups
1805                             (append (mapcar #'car org-babel-load-languages)
1806                                     (mapcar (lambda (el) (intern (car el)))
1807                                             org-src-lang-modes))))))
1808             (body (delete-and-extract-region
1809                    (if (org-region-active-p) (mark) (point)) (point))))
1810         (insert (concat (if (looking-at "^") "" "\n")
1811                         (if arg (concat stars "\n") "")
1812                         "#+begin_src " lang "\n"
1813                         body
1814                         (if (or (= (length body) 0)
1815                                 (string-match "[\r\n]$" body)) "" "\n")
1816                         "#+end_src\n"))
1817         (goto-char start) (move-end-of-line 1)))))
1818
1819 (defvar org-babel-lob-one-liner-regexp)
1820 (defun org-babel-where-is-src-block-result (&optional insert info hash indent)
1821   "Find where the current source block results begin.
1822 Return the point at the beginning of the result of the current
1823 source block.  Specifically at the beginning of the results line.
1824 If no result exists for this block then create a results line
1825 following the source block."
1826   (save-excursion
1827     (let* ((case-fold-search t)
1828            (on-lob-line (save-excursion
1829                           (beginning-of-line 1)
1830                           (looking-at org-babel-lob-one-liner-regexp)))
1831            (inlinep (when (org-babel-get-inline-src-block-matches)
1832                       (match-end 0)))
1833            (name (nth 4 (or info (org-babel-get-src-block-info 'light))))
1834            (head (unless on-lob-line (org-babel-where-is-src-block-head)))
1835            found beg end)
1836       (when head (goto-char head))
1837       (org-with-wide-buffer
1838        (setq
1839         found ;; was there a result (before we potentially insert one)
1840         (or
1841          inlinep
1842          (and
1843           ;; named results:
1844           ;; - return t if it is found, else return nil
1845           ;; - if it does not need to be rebuilt, then don't set end
1846           ;; - if it does need to be rebuilt then do set end
1847           name (setq beg (org-babel-find-named-result name))
1848           (prog1 beg
1849             (when (and hash (not (string= hash (match-string 5))))
1850               (goto-char beg) (setq end beg) ;; beginning of result
1851               (forward-line 1)
1852               (delete-region end (org-babel-result-end)) nil)))
1853          (and
1854           ;; unnamed results:
1855           ;; - return t if it is found, else return nil
1856           ;; - if it is found, and the hash doesn't match, delete and set end
1857           (or on-lob-line (re-search-forward "^[ \t]*#\\+end_src" nil t))
1858           (progn (end-of-line 1)
1859                  (if (eobp) (insert "\n") (forward-char 1))
1860                  (setq end (point))
1861                  (or (and
1862                       (not name)
1863                       (progn ;; unnamed results line already exists
1864                         (catch 'non-comment
1865                           (while (re-search-forward "[^ \f\t\n\r\v]" nil t)
1866                             (beginning-of-line 1)
1867                             (cond
1868                              ((looking-at (concat org-babel-result-regexp "\n"))
1869                               (throw 'non-comment t))
1870                              ((looking-at "^[ \t]*#") (end-of-line 1))
1871                              (t (throw 'non-comment nil))))))
1872                       (let ((this-hash (match-string 5)))
1873                         (prog1 (point)
1874                           ;; must remove and rebuild if hash!=old-hash
1875                           (if (and hash (not (string= hash this-hash)))
1876                               (prog1 nil
1877                                 (forward-line 1)
1878                                 (delete-region
1879                                  end (org-babel-result-end)))
1880                             (setq end nil)))))))))))
1881       (if (not (and insert end)) found
1882         (goto-char end)
1883         (unless beg
1884           (if (looking-at "[\n\r]") (forward-char 1) (insert "\n")))
1885         (insert (concat
1886                  (when (wholenump indent) (make-string indent ? ))
1887                  "#+" org-babel-results-keyword
1888                  (when hash
1889                    (if org-babel-hash-show-time
1890                        (concat
1891                         "["(format-time-string "<%Y-%m-%d %H:%M:%S>")" "hash"]")
1892                      (concat "["hash"]")))
1893                  ":"
1894                  (when name (concat " " name)) "\n"))
1895         (unless beg (insert "\n") (backward-char))
1896         (beginning-of-line 0)
1897         (if hash (org-babel-hide-hash))
1898         (point)))))
1899
1900 (defvar org-block-regexp)
1901 (defun org-babel-read-result ()
1902   "Read the result at `point' into emacs-lisp."
1903   (let ((case-fold-search t) result-string)
1904     (cond
1905      ((org-at-table-p) (org-babel-read-table))
1906      ((org-at-item-p) (org-babel-read-list))
1907      ((looking-at org-bracket-link-regexp) (org-babel-read-link))
1908      ((looking-at org-block-regexp) (org-babel-trim (match-string 4)))
1909      ((or (looking-at "^[ \t]*: ") (looking-at "^[ \t]*:$"))
1910       (setq result-string
1911             (org-babel-trim
1912              (mapconcat (lambda (line)
1913                           (or (and (> (length line) 1)
1914                                    (string-match "^[ \t]*: ?\\(.+\\)" line)
1915                                    (match-string 1 line))
1916                               ""))
1917                         (split-string
1918                          (buffer-substring
1919                           (point) (org-babel-result-end)) "[\r\n]+")
1920                         "\n")))
1921       (or (org-babel-number-p result-string) result-string))
1922      ((looking-at org-babel-result-regexp)
1923       (save-excursion (forward-line 1) (org-babel-read-result))))))
1924
1925 (defun org-babel-read-table ()
1926   "Read the table at `point' into emacs-lisp."
1927   (mapcar (lambda (row)
1928             (if (and (symbolp row) (equal row 'hline)) row
1929               (mapcar (lambda (el) (org-babel-read el 'inhibit-lisp-eval)) row)))
1930           (org-table-to-lisp)))
1931
1932 (defun org-babel-read-list ()
1933   "Read the list at `point' into emacs-lisp."
1934   (mapcar (lambda (el) (org-babel-read el 'inhibit-lisp-eval))
1935           (mapcar #'cadr (cdr (org-list-parse-list)))))
1936
1937 (defvar org-link-types-re)
1938 (defun org-babel-read-link ()
1939   "Read the link at `point' into emacs-lisp.
1940 If the path of the link is a file path it is expanded using
1941 `expand-file-name'."
1942   (let* ((case-fold-search t)
1943          (raw (and (looking-at org-bracket-link-regexp)
1944                    (org-no-properties (match-string 1))))
1945          (type (and (string-match org-link-types-re raw)
1946                     (match-string 1 raw))))
1947     (cond
1948      ((not type) (expand-file-name raw))
1949      ((string= type "file")
1950       (and (string-match "file\\(.*\\):\\(.+\\)" raw)
1951            (expand-file-name (match-string 2 raw))))
1952      (t raw))))
1953
1954 (defun org-babel-format-result (result &optional sep)
1955   "Format RESULT for writing to file."
1956   (let ((echo-res (lambda (r) (if (stringp r) r (format "%S" r)))))
1957     (if (listp result)
1958         ;; table result
1959         (orgtbl-to-generic
1960          result (list :sep (or sep "\t") :fmt echo-res))
1961       ;; scalar result
1962       (funcall echo-res result))))
1963
1964 (defun org-babel-insert-result
1965   (result &optional result-params info hash indent lang)
1966   "Insert RESULT into the current buffer.
1967 By default RESULT is inserted after the end of the
1968 current source block.  With optional argument RESULT-PARAMS
1969 controls insertion of results in the org-mode file.
1970 RESULT-PARAMS can take the following values:
1971
1972 replace - (default option) insert results after the source block
1973           replacing any previously inserted results
1974
1975 silent -- no results are inserted into the Org-mode buffer but
1976           the results are echoed to the minibuffer and are
1977           ingested by Emacs (a potentially time consuming
1978           process)
1979
1980 file ---- the results are interpreted as a file path, and are
1981           inserted into the buffer using the Org-mode file syntax
1982
1983 list ---- the results are interpreted as an Org-mode list.
1984
1985 raw ----- results are added directly to the Org-mode file.  This
1986           is a good option if you code block will output org-mode
1987           formatted text.
1988
1989 drawer -- results are added directly to the Org-mode file as with
1990           \"raw\", but are wrapped in a RESULTS drawer, allowing
1991           them to later be replaced or removed automatically.
1992
1993 org ----- results are added inside of a \"#+BEGIN_SRC org\" block.
1994           They are not comma-escaped when inserted, but Org syntax
1995           here will be discarded when exporting the file.
1996
1997 html ---- results are added inside of a #+BEGIN_HTML block.  This
1998           is a good option if you code block will output html
1999           formatted text.
2000
2001 latex --- results are added inside of a #+BEGIN_LATEX block.
2002           This is a good option if you code block will output
2003           latex formatted text.
2004
2005 code ---- the results are extracted in the syntax of the source
2006           code of the language being evaluated and are added
2007           inside of a #+BEGIN_SRC block with the source-code
2008           language set appropriately.  Note this relies on the
2009           optional LANG argument."
2010   (if (stringp result)
2011       (progn
2012         (setq result (org-no-properties result))
2013         (when (member "file" result-params)
2014           (setq result (org-babel-result-to-file
2015                         result (when (assoc :file-desc (nth 2 info))
2016                                  (or (cdr (assoc :file-desc (nth 2 info)))
2017                                      result))))))
2018     (unless (listp result) (setq result (format "%S" result))))
2019   (if (and result-params (member "silent" result-params))
2020       (progn
2021         (message (replace-regexp-in-string "%" "%%" (format "%S" result)))
2022         result)
2023     (save-excursion
2024       (let* ((inlinep
2025               (save-excursion
2026                 (when (or (org-babel-get-inline-src-block-matches)
2027                           (org-babel-get-lob-one-liner-matches))
2028                   (goto-char (match-end 0))
2029                   (insert (if (listp result) "\n" " "))
2030                   (point))))
2031              (existing-result (unless inlinep
2032                                 (org-babel-where-is-src-block-result
2033                                  t info hash indent)))
2034              (results-switches
2035               (cdr (assoc :results_switches (nth 2 info))))
2036              (visible-beg (copy-marker (point-min)))
2037              (visible-end (copy-marker (point-max)))
2038              ;; When results exist outside of the current visible
2039              ;; region of the buffer, be sure to widen buffer to
2040              ;; update them.
2041              (outside-scope-p (and existing-result
2042                                    (or (> visible-beg existing-result)
2043                                        (<= visible-end existing-result))))
2044              beg end)
2045         (when (and (stringp result)  ; ensure results end in a newline
2046                    (not inlinep)
2047                    (> (length result) 0)
2048                    (not (or (string-equal (substring result -1) "\n")
2049                             (string-equal (substring result -1) "\r"))))
2050           (setq result (concat result "\n")))
2051         (unwind-protect
2052             (progn
2053               (when outside-scope-p (widen))
2054               (if (not existing-result)
2055                   (setq beg (or inlinep (point)))
2056                 (goto-char existing-result)
2057                 (save-excursion
2058                   (re-search-forward "#" nil t)
2059                   (setq indent (- (current-column) 1)))
2060                 (forward-line 1)
2061                 (setq beg (point))
2062                 (cond
2063                  ((member "replace" result-params)
2064                   (delete-region (point) (org-babel-result-end)))
2065                  ((member "append" result-params)
2066                   (goto-char (org-babel-result-end)) (setq beg (point-marker)))
2067                  ((member "prepend" result-params)))) ; already there
2068               (setq results-switches
2069                     (if results-switches (concat " " results-switches) ""))
2070               (let ((wrap (lambda (start finish &optional no-escape)
2071                             (goto-char end) (insert (concat finish "\n"))
2072                             (goto-char beg) (insert (concat start "\n"))
2073                             (unless no-escape
2074                               (org-escape-code-in-region (min (point) end) end))
2075                             (goto-char end) (goto-char (point-at-eol))
2076                             (setq end (point-marker))))
2077                     (proper-list-p (lambda (it) (and (listp it) (null (cdr (last it)))))))
2078                 ;; insert results based on type
2079                 (cond
2080                  ;; do nothing for an empty result
2081                  ((null result))
2082                  ;; insert a list if preferred
2083                  ((member "list" result-params)
2084                   (insert
2085                    (org-babel-trim
2086                     (org-list-to-generic
2087                      (cons 'unordered
2088                            (mapcar
2089                             (lambda (el) (list nil (if (stringp el) el (format "%S" el))))
2090                             (if (listp result) result (split-string result "\n" t))))
2091                      '(:splicep nil :istart "- " :iend "\n")))
2092                    "\n"))
2093                  ;; assume the result is a table if it's not a string
2094                  ((funcall proper-list-p result)
2095                   (goto-char beg)
2096                   (insert (concat (orgtbl-to-orgtbl
2097                                    (if (or (eq 'hline (car result))
2098                                            (and (listp (car result))
2099                                                 (listp (cdr (car result)))))
2100                                        result (list result))
2101                                    '(:fmt (lambda (cell) (format "%s" cell)))) "\n"))
2102                   (goto-char beg) (when (org-at-table-p) (org-table-align)))
2103                  ((and (listp result) (not (funcall proper-list-p result)))
2104                   (insert (format "%s\n" result)))
2105                  ((member "file" result-params)
2106                   (when inlinep (goto-char inlinep))
2107                   (insert result))
2108                  (t (goto-char beg) (insert result)))
2109                 (when (funcall proper-list-p result) (goto-char (org-table-end)))
2110                 (setq end (point-marker))
2111                 ;; possibly wrap result
2112                 (cond
2113                  ((assoc :wrap (nth 2 info))
2114                   (let ((name (or (cdr (assoc :wrap (nth 2 info))) "RESULTS")))
2115                     (funcall wrap (concat "#+BEGIN_" name)
2116                              (concat "#+END_" (car (org-split-string name))))))
2117                  ((member "html" result-params)
2118                   (funcall wrap "#+BEGIN_HTML" "#+END_HTML"))
2119                  ((member "latex" result-params)
2120                   (funcall wrap "#+BEGIN_LaTeX" "#+END_LaTeX"))
2121                  ((member "org" result-params)
2122                   (goto-char beg) (if (org-at-table-p) (org-cycle))
2123                   (funcall wrap "#+BEGIN_SRC org" "#+END_SRC"))
2124                  ((member "code" result-params)
2125                   (funcall wrap (format "#+BEGIN_SRC %s%s" (or lang "none") results-switches)
2126                            "#+END_SRC"))
2127                  ((member "raw" result-params)
2128                   (goto-char beg) (if (org-at-table-p) (org-cycle)))
2129                  ((or (member "drawer" result-params)
2130                       ;; Stay backward compatible with <7.9.2
2131                       (member "wrap" result-params))
2132                   (goto-char beg) (if (org-at-table-p) (org-cycle))
2133                   (funcall wrap ":RESULTS:" ":END:" 'no-escape))
2134                  ((and (not (funcall proper-list-p result))
2135                        (not (member "file" result-params)))
2136                   (org-babel-examplize-region beg end results-switches)
2137                   (setq end (point)))))
2138               ;; possibly indent the results to match the #+results line
2139               (when (and (not inlinep) (numberp indent) indent (> indent 0)
2140                          ;; in this case `table-align' does the work for us
2141                          (not (and (listp result)
2142                                    (member "append" result-params))))
2143                 (indent-rigidly beg end indent))
2144               (if (null result)
2145                   (if (member "value" result-params)
2146                       (message "Code block returned no value.")
2147                     (message "Code block produced no output."))
2148                 (message "Code block evaluation complete.")))
2149           (when outside-scope-p (narrow-to-region visible-beg visible-end))
2150           (set-marker visible-beg nil)
2151           (set-marker visible-end nil))))))
2152
2153 (defun org-babel-remove-result (&optional info)
2154   "Remove the result of the current source block."
2155   (interactive)
2156   (let ((location (org-babel-where-is-src-block-result nil info)) start)
2157     (when location
2158       (setq start (- location 1))
2159       (save-excursion
2160         (goto-char location) (forward-line 1)
2161         (delete-region start (org-babel-result-end))))))
2162
2163 (defun org-babel-result-end ()
2164   "Return the point at the end of the current set of results."
2165   (save-excursion
2166     (cond
2167      ((org-at-table-p) (progn (goto-char (org-table-end)) (point)))
2168      ((org-at-item-p) (let* ((struct (org-list-struct))
2169                              (prvs (org-list-prevs-alist struct)))
2170                         (org-list-get-list-end (point-at-bol) struct prvs)))
2171      ((let ((case-fold-search t)) (looking-at "^\\([ \t]*\\):results:"))
2172       (progn (re-search-forward (concat "^" (match-string 1) ":END:"))
2173              (forward-char 1) (point)))
2174      (t
2175       (let ((case-fold-search t))
2176         (if (looking-at (concat "[ \t]*#\\+begin_\\([^ \t\n\r]+\\)"))
2177             (progn (re-search-forward (concat "[ \t]*#\\+end_" (match-string 1))
2178                                       nil t)
2179                    (forward-char 1))
2180           (while (looking-at "[ \t]*\\(: \\|:$\\|\\[\\[\\)")
2181             (forward-line 1))))
2182       (point)))))
2183
2184 (defun org-babel-result-to-file (result &optional description)
2185   "Convert RESULT into an `org-mode' link with optional DESCRIPTION.
2186 If the `default-directory' is different from the containing
2187 file's directory then expand relative links."
2188   (when (stringp result)
2189     (format "[[file:%s]%s]"
2190             (if (and default-directory
2191                      buffer-file-name
2192                      (not (string= (expand-file-name default-directory)
2193                                    (expand-file-name
2194                                     (file-name-directory buffer-file-name)))))
2195                 (expand-file-name result default-directory)
2196               result)
2197             (if description (concat "[" description "]") ""))))
2198
2199 (defvar org-babel-capitalize-examplize-region-markers nil
2200   "Make true to capitalize begin/end example markers inserted by code blocks.")
2201
2202 (defun org-babel-examplize-region (beg end &optional results-switches)
2203   "Comment out region using the inline '==' or ': ' org example quote."
2204   (interactive "*r")
2205   (let ((chars-between (lambda (b e)
2206                          (not (string-match "^[\\s]*$" (buffer-substring b e)))))
2207         (maybe-cap (lambda (str) (if org-babel-capitalize-examplize-region-markers
2208                                      (upcase str) str))))
2209     (if (or (funcall chars-between (save-excursion (goto-char beg) (point-at-bol)) beg)
2210             (funcall chars-between end (save-excursion (goto-char end) (point-at-eol))))
2211         (save-excursion
2212           (goto-char beg)
2213           (insert (format org-babel-inline-result-wrap
2214                           (prog1 (buffer-substring beg end)
2215                             (delete-region beg end)))))
2216       (let ((size (count-lines beg end)))
2217         (save-excursion
2218           (cond ((= size 0))          ; do nothing for an empty result
2219                 ((< size org-babel-min-lines-for-block-output)
2220                  (goto-char beg)
2221                  (dotimes (n size)
2222                    (beginning-of-line 1) (insert ": ") (forward-line 1)))
2223                 (t
2224                  (goto-char beg)
2225                  (insert (if results-switches
2226                              (format "%s%s\n"
2227                                      (funcall maybe-cap "#+begin_example")
2228                                      results-switches)
2229                            (funcall maybe-cap "#+begin_example\n")))
2230                  (if (markerp end) (goto-char end) (forward-char (- end beg)))
2231                  (insert (funcall maybe-cap "#+end_example\n")))))))))
2232
2233 (defun org-babel-update-block-body (new-body)
2234   "Update the body of the current code block to NEW-BODY."
2235   (if (not (org-babel-where-is-src-block-head))
2236       (error "Not in a source block")
2237     (save-match-data
2238       (replace-match (concat (org-babel-trim new-body) "\n") nil t nil 5))
2239     (indent-rigidly (match-beginning 5) (match-end 5) 2)))
2240
2241 (defun org-babel-merge-params (&rest plists)
2242   "Combine all parameter association lists in PLISTS.
2243 Later elements of PLISTS override the values of previous elements.
2244 This takes into account some special considerations for certain
2245 parameters when merging lists."
2246   (let* ((results-exclusive-groups
2247           (mapcar (lambda (group) (mapcar #'symbol-name group))
2248                   (cdr (assoc 'results org-babel-common-header-args-w-values))))
2249          (exports-exclusive-groups
2250           (mapcar (lambda (group) (mapcar #'symbol-name group))
2251                   (cdr (assoc 'exports org-babel-common-header-args-w-values))))
2252          (variable-index 0)
2253          (e-merge (lambda (exclusive-groups &rest result-params)
2254                     ;; maintain exclusivity of mutually exclusive parameters
2255                     (let (output)
2256                       (mapc (lambda (new-params)
2257                               (mapc (lambda (new-param)
2258                                       (mapc (lambda (exclusive-group)
2259                                               (when (member new-param exclusive-group)
2260                                                 (mapcar (lambda (excluded-param)
2261                                                           (setq output
2262                                                                 (delete
2263                                                                  excluded-param
2264                                                                  output)))
2265                                                         exclusive-group)))
2266                                             exclusive-groups)
2267                                       (setq output (org-uniquify
2268                                                     (cons new-param output))))
2269                                     new-params))
2270                             result-params)
2271                       output)))
2272          params results exports tangle noweb cache vars shebang comments padline)
2273
2274     (mapc
2275      (lambda (plist)
2276        (mapc
2277         (lambda (pair)
2278           (case (car pair)
2279             (:var
2280              (let ((name (if (listp (cdr pair))
2281                              (cadr pair)
2282                            (and (string-match "^\\([^= \f\t\n\r\v]+\\)[ \t]*="
2283                                               (cdr pair))
2284                                 (intern (match-string 1 (cdr pair)))))))
2285                (if name
2286                    (setq vars
2287                          (append
2288                           (if (member name (mapcar #'car vars))
2289                               (delq nil
2290                                     (mapcar
2291                                      (lambda (p)
2292                                        (unless (equal (car p) name) p))
2293                                      vars))
2294                             vars)
2295                           (list (cons name pair))))
2296                  ;; if no name is given and we already have named variables
2297                  ;; then assign to named variables in order
2298                  (if (and vars (nth variable-index vars))
2299                      (prog1 (setf (cddr (nth variable-index vars))
2300                                   (concat (symbol-name
2301                                            (car (nth variable-index vars)))
2302                                           "=" (cdr pair)))
2303                        (incf variable-index))
2304                    (error "Variable \"%s\" must be assigned a default value"
2305                           (cdr pair))))))
2306             (:results
2307              (setq results (funcall e-merge results-exclusive-groups
2308                                     results
2309                                     (split-string
2310                                      (let ((r (cdr pair)))
2311                                        (if (stringp r) r (eval r)))))))
2312             (:file
2313              (when (cdr pair)
2314                (setq results (funcall e-merge results-exclusive-groups
2315                                       results '("file")))
2316                (unless (or (member "both" exports)
2317                            (member "none" exports)
2318                            (member "code" exports))
2319                  (setq exports (funcall e-merge exports-exclusive-groups
2320                                         exports '("results"))))
2321                (setq params (cons pair (assq-delete-all (car pair) params)))))
2322             (:exports
2323              (setq exports (funcall e-merge exports-exclusive-groups
2324                                     exports (split-string (cdr pair)))))
2325             (:tangle ;; take the latest -- always overwrite
2326              (setq tangle (or (list (cdr pair)) tangle)))
2327             (:noweb
2328              (setq noweb (funcall e-merge
2329                                   '(("yes" "no" "tangle" "no-export"
2330                                      "strip-export" "eval"))
2331                                   noweb
2332                                   (split-string (or (cdr pair) "")))))
2333             (:cache
2334              (setq cache (funcall e-merge '(("yes" "no")) cache
2335                                   (split-string (or (cdr pair) "")))))
2336             (:padline
2337              (setq padline (funcall e-merge '(("yes" "no")) padline
2338                                     (split-string (or (cdr pair) "")))))
2339             (:shebang ;; take the latest -- always overwrite
2340              (setq shebang (or (list (cdr pair)) shebang)))
2341             (:comments
2342              (setq comments (funcall e-merge '(("yes" "no")) comments
2343                                      (split-string (or (cdr pair) "")))))
2344             (t ;; replace: this covers e.g. :session
2345              (setq params (cons pair (assq-delete-all (car pair) params))))))
2346         plist))
2347      plists)
2348     (setq vars (reverse vars))
2349     (while vars (setq params (cons (cons :var (cddr (pop vars))) params)))
2350     (mapc
2351      (lambda (hd)
2352        (let ((key (intern (concat ":" (symbol-name hd))))
2353              (val (eval hd)))
2354          (setf params (cons (cons key (mapconcat 'identity val " ")) params))))
2355      '(results exports tangle noweb padline cache shebang comments))
2356     params))
2357
2358 (defvar org-babel-use-quick-and-dirty-noweb-expansion nil
2359   "Set to true to use regular expressions to expand noweb references.
2360 This results in much faster noweb reference expansion but does
2361 not properly allow code blocks to inherit the \":noweb-ref\"
2362 header argument from buffer or subtree wide properties.")
2363
2364 (defun org-babel-noweb-p (params context)
2365   "Check if PARAMS require expansion in CONTEXT.
2366 CONTEXT may be one of :tangle, :export or :eval."
2367   (let* (intersect
2368          (intersect (lambda (as bs)
2369                       (when as
2370                         (if (member (car as) bs)
2371                             (car as)
2372                           (funcall intersect (cdr as) bs))))))
2373     (funcall intersect (case context
2374                          (:tangle '("yes" "tangle" "no-export" "strip-export"))
2375                          (:eval   '("yes" "no-export" "strip-export" "eval"))
2376                          (:export '("yes")))
2377              (split-string (or (cdr (assoc :noweb params)) "")))))
2378
2379 (defun org-babel-expand-noweb-references (&optional info parent-buffer)
2380   "Expand Noweb references in the body of the current source code block.
2381
2382 For example the following reference would be replaced with the
2383 body of the source-code block named 'example-block'.
2384
2385 <<example-block>>
2386
2387 Note that any text preceding the <<foo>> construct on a line will
2388 be interposed between the lines of the replacement text.  So for
2389 example if <<foo>> is placed behind a comment, then the entire
2390 replacement text will also be commented.
2391
2392 This function must be called from inside of the buffer containing
2393 the source-code block which holds BODY.
2394
2395 In addition the following syntax can be used to insert the
2396 results of evaluating the source-code block named 'example-block'.
2397
2398 <<example-block()>>
2399
2400 Any optional arguments can be passed to example-block by placing
2401 the arguments inside the parenthesis following the convention
2402 defined by `org-babel-lob'.  For example
2403
2404 <<example-block(a=9)>>
2405
2406 would set the value of argument \"a\" equal to \"9\".  Note that
2407 these arguments are not evaluated in the current source-code
2408 block but are passed literally to the \"example-block\"."
2409   (let* ((parent-buffer (or parent-buffer (current-buffer)))
2410          (info (or info (org-babel-get-src-block-info 'light)))
2411          (lang (nth 0 info))
2412          (body (nth 1 info))
2413          (ob-nww-start org-babel-noweb-wrap-start)
2414          (ob-nww-end org-babel-noweb-wrap-end)
2415          (comment (string= "noweb" (cdr (assoc :comments (nth 2 info)))))
2416          (rx-prefix (concat "\\(" org-babel-src-name-regexp "\\|"
2417                             ":noweb-ref[ \t]+" "\\)"))
2418          (new-body "")
2419          (nb-add (lambda (text) (setq new-body (concat new-body text))))
2420          (c-wrap (lambda (text)
2421                    (with-temp-buffer
2422                      (funcall (intern (concat lang "-mode")))
2423                      (comment-region (point) (progn (insert text) (point)))
2424                      (org-babel-trim (buffer-string)))))
2425          index source-name evaluate prefix blocks-in-buffer)
2426     (with-temp-buffer
2427       (org-set-local 'org-babel-noweb-wrap-start ob-nww-start)
2428       (org-set-local 'org-babel-noweb-wrap-end ob-nww-end)
2429       (insert body) (goto-char (point-min))
2430       (setq index (point))
2431       (while (and (re-search-forward (org-babel-noweb-wrap) nil t))
2432         (save-match-data (setf source-name (match-string 1)))
2433         (save-match-data (setq evaluate (string-match "\(.*\)" source-name)))
2434         (save-match-data
2435           (setq prefix
2436                 (buffer-substring (match-beginning 0)
2437                                   (save-excursion
2438                                     (beginning-of-line 1) (point)))))
2439         ;; add interval to new-body (removing noweb reference)
2440         (goto-char (match-beginning 0))
2441         (funcall nb-add (buffer-substring index (point)))
2442         (goto-char (match-end 0))
2443         (setq index (point))
2444         (funcall nb-add
2445                  (with-current-buffer parent-buffer
2446                    (save-restriction
2447                      (widen)
2448                      (mapconcat ;; interpose PREFIX between every line
2449                       #'identity
2450                       (split-string
2451                        (if evaluate
2452                            (let ((raw (org-babel-ref-resolve source-name)))
2453                              (if (stringp raw) raw (format "%S" raw)))
2454                          (or
2455                           ;; retrieve from the library of babel
2456                           (nth 2 (assoc (intern source-name)
2457                                         org-babel-library-of-babel))
2458                           ;; return the contents of headlines literally
2459                           (save-excursion
2460                             (when (org-babel-ref-goto-headline-id source-name)
2461                               (org-babel-ref-headline-body)))
2462                           ;; find the expansion of reference in this buffer
2463                           (let ((rx (concat rx-prefix source-name "[ \t\n]"))
2464                                 expansion)
2465                             (save-excursion
2466                               (goto-char (point-min))
2467                               (if org-babel-use-quick-and-dirty-noweb-expansion
2468                                   (while (re-search-forward rx nil t)
2469                                     (let* ((i (org-babel-get-src-block-info 'light))
2470                                            (body (org-babel-expand-noweb-references i))
2471                                            (sep (or (cdr (assoc :noweb-sep (nth 2 i)))
2472                                                     "\n"))
2473                                            (full (if comment
2474                                                      ((lambda (cs)
2475                                                         (concat (funcall c-wrap (car cs)) "\n"
2476                                                                 body "\n"
2477                                                                 (funcall c-wrap (cadr cs))))
2478                                                       (org-babel-tangle-comment-links i))
2479                                                    body)))
2480                                       (setq expansion (cons sep (cons full expansion)))))
2481                                 (org-babel-map-src-blocks nil
2482                                   (let ((i (org-babel-get-src-block-info 'light)))
2483                                     (when (equal (or (cdr (assoc :noweb-ref (nth 2 i)))
2484                                                      (nth 4 i))
2485                                                  source-name)
2486                                       (let* ((body (org-babel-expand-noweb-references i))
2487                                              (sep (or (cdr (assoc :noweb-sep (nth 2 i)))
2488                                                       "\n"))
2489                                              (full (if comment
2490                                                        ((lambda (cs)
2491                                                           (concat (funcall c-wrap (car cs)) "\n"
2492                                                                   body "\n"
2493                                                                   (funcall c-wrap (cadr cs))))
2494                                                         (org-babel-tangle-comment-links i))
2495                                                      body)))
2496                                         (setq expansion
2497                                               (cons sep (cons full expansion)))))))))
2498                             (and expansion
2499                                  (mapconcat #'identity (nreverse (cdr expansion)) "")))
2500                           ;; possibly raise an error if named block doesn't exist
2501                           (if (member lang org-babel-noweb-error-langs)
2502                               (error "%s" (concat
2503                                            (org-babel-noweb-wrap source-name)
2504                                            "could not be resolved (see "
2505                                            "`org-babel-noweb-error-langs')"))
2506                             "")))
2507                        "[\n\r]") (concat "\n" prefix))))))
2508       (funcall nb-add (buffer-substring index (point-max))))
2509     new-body))
2510
2511 (defun org-babel-script-escape (str &optional force)
2512   "Safely convert tables into elisp lists."
2513   (let (in-single in-double out)
2514     ((lambda (escaped) (condition-case nil (org-babel-read escaped) (error escaped)))
2515      (if (or force
2516              (and (stringp str)
2517                   (> (length str) 2)
2518                   (or (and (string-equal "[" (substring str 0 1))
2519                            (string-equal "]" (substring str -1)))
2520                       (and (string-equal "{" (substring str 0 1))
2521                            (string-equal "}" (substring str -1)))
2522                       (and (string-equal "(" (substring str 0 1))
2523                            (string-equal ")" (substring str -1))))))
2524          (org-babel-read
2525           (concat
2526            "'"
2527            (progn
2528              (mapc
2529               (lambda (ch)
2530                 (setq
2531                  out
2532                  (case ch
2533                    (91 (if (or in-double in-single) ; [
2534                            (cons 91 out)
2535                          (cons 40 out)))
2536                    (93 (if (or in-double in-single) ; ]
2537                            (cons 93 out)
2538                          (cons 41 out)))
2539                    (123 (if (or in-double in-single) ; {
2540                             (cons 123 out)
2541                           (cons 40 out)))
2542                    (125 (if (or in-double in-single) ; }
2543                             (cons 125 out)
2544                           (cons 41 out)))
2545                    (44 (if (or in-double in-single) ; ,
2546                            (cons 44 out) (cons 32 out)))
2547                    (39 (if in-double    ; '
2548                            (cons 39 out)
2549                          (setq in-single (not in-single)) (cons 34 out)))
2550                    (34 (if in-single    ; "
2551                            (append (list 34 32) out)
2552                          (setq in-double (not in-double)) (cons 34 out)))
2553                    (t  (cons ch out)))))
2554               (string-to-list str))
2555              (apply #'string (reverse out)))))
2556        str))))
2557
2558 (defun org-babel-read (cell &optional inhibit-lisp-eval)
2559   "Convert the string value of CELL to a number if appropriate.
2560 Otherwise if cell looks like lisp (meaning it starts with a
2561 \"(\", \"'\", \"`\" or a \"[\") then read it as lisp,
2562 otherwise return it unmodified as a string.  Optional argument
2563 NO-LISP-EVAL inhibits lisp evaluation for situations in which is
2564 it not appropriate."
2565   (if (and (stringp cell) (not (equal cell "")))
2566       (or (org-babel-number-p cell)
2567           (if (and (not inhibit-lisp-eval)
2568                    (or (member (substring cell 0 1) '("(" "'" "`" "["))
2569                        (string= cell "*this*")))
2570               (eval (read cell))
2571             (if (string= (substring cell 0 1) "\"")
2572                 (read cell)
2573               (progn (set-text-properties 0 (length cell) nil cell) cell))))
2574     cell))
2575
2576 (defun org-babel-number-p (string)
2577   "If STRING represents a number return its value."
2578   (if (and (string-match "[0-9]+" string)
2579            (string-match "^-?[0-9]*\\.?[0-9]*$" string)
2580            (= (length (substring string (match-beginning 0)
2581                                  (match-end 0)))
2582               (length string)))
2583       (string-to-number string)))
2584
2585 (defun org-babel-import-elisp-from-file (file-name &optional separator)
2586   "Read the results located at FILE-NAME into an elisp table.
2587 If the table is trivial, then return it as a scalar."
2588   (let (result)
2589     (save-window-excursion
2590       (with-temp-buffer
2591         (condition-case err
2592             (progn
2593               (org-table-import file-name separator)
2594               (delete-file file-name)
2595               (setq result (mapcar (lambda (row)
2596                                      (mapcar #'org-babel-string-read row))
2597                                    (org-table-to-lisp))))
2598           (error (message "Error reading results: %s" err) nil)))
2599       (if (null (cdr result)) ;; if result is trivial vector, then scalarize it
2600           (if (consp (car result))
2601               (if (null (cdr (car result)))
2602                   (caar result)
2603                 result)
2604             (car result))
2605         result))))
2606
2607 (defun org-babel-string-read (cell)
2608   "Strip nested \"s from around strings."
2609   (org-babel-read (or (and (stringp cell)
2610                            (string-match "\\\"\\(.+\\)\\\"" cell)
2611                            (match-string 1 cell))
2612                       cell) t))
2613
2614 (defun org-babel-chomp (string &optional regexp)
2615   "Strip trailing spaces and carriage returns from STRING.
2616 Default regexp used is \"[ \f\t\n\r\v]\" but can be
2617 overwritten by specifying a regexp as a second argument."
2618   (let ((regexp (or regexp "[ \f\t\n\r\v]")))
2619     (while (and (> (length string) 0)
2620                 (string-match regexp (substring string -1)))
2621       (setq string (substring string 0 -1)))
2622     string))
2623
2624 (defun org-babel-trim (string &optional regexp)
2625   "Strip leading and trailing spaces and carriage returns from STRING.
2626 Like `org-babel-chomp' only it runs on both the front and back
2627 of the string."
2628   (org-babel-chomp (org-reverse-string
2629                     (org-babel-chomp (org-reverse-string string) regexp))
2630                    regexp))
2631
2632 (defun org-babel-tramp-handle-call-process-region
2633   (start end program &optional delete buffer display &rest args)
2634   "Use Tramp to handle `call-process-region'.
2635 Fixes a bug in `tramp-handle-call-process-region'."
2636   (if (and (featurep 'tramp) (file-remote-p default-directory))
2637       (let ((tmpfile (tramp-compat-make-temp-file "")))
2638         (write-region start end tmpfile)
2639         (when delete (delete-region start end))
2640         (unwind-protect
2641             ;;  (apply 'call-process program tmpfile buffer display args)
2642             ;; bug in tramp
2643             (apply 'process-file program tmpfile buffer display args)
2644           (delete-file tmpfile)))
2645     ;; org-babel-call-process-region-original is the original emacs
2646     ;; definition.  It is in scope from the let binding in
2647     ;; org-babel-execute-src-block
2648     (apply org-babel-call-process-region-original
2649            start end program delete buffer display args)))
2650
2651 (defun org-babel-local-file-name (file)
2652   "Return the local name component of FILE."
2653   (if (file-remote-p file)
2654       (let (localname)
2655         (with-parsed-tramp-file-name file nil
2656                                      localname))
2657     file))
2658
2659 (defun org-babel-process-file-name (name &optional no-quote-p)
2660   "Prepare NAME to be used in an external process.
2661 If NAME specifies a remote location, the remote portion of the
2662 name is removed, since in that case the process will be executing
2663 remotely.  The file name is then processed by `expand-file-name'.
2664 Unless second argument NO-QUOTE-P is non-nil, the file name is
2665 additionally processed by `shell-quote-argument'"
2666   ((lambda (f) (if no-quote-p f (shell-quote-argument f)))
2667    (expand-file-name (org-babel-local-file-name name))))
2668
2669 (defvar org-babel-temporary-directory)
2670 (unless (or noninteractive (boundp 'org-babel-temporary-directory))
2671   (defvar org-babel-temporary-directory
2672     (or (and (boundp 'org-babel-temporary-directory)
2673              (file-exists-p org-babel-temporary-directory)
2674              org-babel-temporary-directory)
2675         (make-temp-file "babel-" t))
2676     "Directory to hold temporary files created to execute code blocks.
2677 Used by `org-babel-temp-file'.  This directory will be removed on
2678 Emacs shutdown."))
2679
2680 (defmacro org-babel-result-cond (result-params scalar-form &rest table-forms)
2681   "Call the code to parse raw string results according to RESULT-PARAMS."
2682   (declare (indent 1)
2683            (debug (form form &rest form)))
2684   (org-with-gensyms (params)
2685     `(let ((,params ,result-params))
2686        (unless (member "none" ,params)
2687          (if (or (member "scalar" ,params)
2688                  (member "verbatim" ,params)
2689                  (member "html" ,params)
2690                  (member "code" ,params)
2691                  (member "pp" ,params)
2692                  (and (or (member "output" ,params)
2693                           (member "raw"    ,params)
2694                           (member "org"    ,params)
2695                           (member "drawer" ,params))
2696                       (not (member "table" ,params))))
2697              ,scalar-form
2698            ,@table-forms)))))
2699 (def-edebug-spec org-babel-result-cond (form form body))
2700
2701 (defun org-babel-temp-file (prefix &optional suffix)
2702   "Create a temporary file in the `org-babel-temporary-directory'.
2703 Passes PREFIX and SUFFIX directly to `make-temp-file' with the
2704 value of `temporary-file-directory' temporarily set to the value
2705 of `org-babel-temporary-directory'."
2706   (if (file-remote-p default-directory)
2707       (let ((prefix
2708              (concat (file-remote-p default-directory)
2709                      (expand-file-name prefix temporary-file-directory))))
2710         (make-temp-file prefix nil suffix))
2711     (let ((temporary-file-directory
2712            (or (and (boundp 'org-babel-temporary-directory)
2713                     (file-exists-p org-babel-temporary-directory)
2714                     org-babel-temporary-directory)
2715                temporary-file-directory)))
2716       (make-temp-file prefix nil suffix))))
2717
2718 (defun org-babel-remove-temporary-directory ()
2719   "Remove `org-babel-temporary-directory' on Emacs shutdown."
2720   (when (and (boundp 'org-babel-temporary-directory)
2721              (file-exists-p org-babel-temporary-directory))
2722     ;; taken from `delete-directory' in files.el
2723     (condition-case nil
2724         (progn
2725           (mapc (lambda (file)
2726                   ;; This test is equivalent to
2727                   ;; (and (file-directory-p fn) (not (file-symlink-p fn)))
2728                   ;; but more efficient
2729                   (if (eq t (car (file-attributes file)))
2730                       (delete-directory file)
2731                     (delete-file file)))
2732                 ;; We do not want to delete "." and "..".
2733                 (directory-files org-babel-temporary-directory 'full
2734                                  "^\\([^.]\\|\\.\\([^.]\\|\\..\\)\\).*"))
2735           (delete-directory org-babel-temporary-directory))
2736       (error
2737        (message "Failed to remove temporary Org-babel directory %s"
2738                 (if (boundp 'org-babel-temporary-directory)
2739                     org-babel-temporary-directory
2740                   "[directory not defined]"))))))
2741
2742 (add-hook 'kill-emacs-hook 'org-babel-remove-temporary-directory)
2743
2744 (provide 'ob-core)
2745
2746 ;; Local variables:
2747 ;; generated-autoload-file: "org-loaddefs.el"
2748 ;; End:
2749
2750 ;;; ob-core.el ends here